Algebra 1 : Linear Equations

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #481 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle \frac{x}{-2.3}=4.7\)

Possible Answers:

\(\displaystyle 19.42\)

\(\displaystyle -10.81\)

\(\displaystyle -12.75\)

\(\displaystyle -13.25\)

\(\displaystyle 16.65\)

Correct answer:

\(\displaystyle -10.81\)

Explanation:

\(\displaystyle \frac{x}{-2.3}=4.7\) 

Multiply by \(\displaystyle -2.3\) on both sides. When multiplying with a positive number, the answer is negative.

\(\displaystyle x=-10.81\)

Example Question #482 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle \frac{x}{-5.4}=-9.8\)

Possible Answers:

\(\displaystyle 38.44\)

\(\displaystyle 46.76\)

\(\displaystyle -28.84\)

\(\displaystyle 52.92\)

\(\displaystyle -34.44\)

Correct answer:

\(\displaystyle 52.92\)

Explanation:

\(\displaystyle \frac{x}{-5.4}=-9.8\) 

Multiply by \(\displaystyle -5.4\) on both sides. When multiplying with another negative number, the answer is positive.

\(\displaystyle x=52.92\)

Example Question #483 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle x+16.87=9.21\)

Possible Answers:

\(\displaystyle -26.08\)

\(\displaystyle -7.66\)

\(\displaystyle 9.66\)

\(\displaystyle 12.04\)

\(\displaystyle 26.08\)

Correct answer:

\(\displaystyle -7.66\)

Explanation:

\(\displaystyle x+16.87=9.21\) Subtract \(\displaystyle 16.87\) on both sides. Since \(\displaystyle 16.87\) is greater than \(\displaystyle 9.21\) and is negative, our answer is negative. We treat as a subtraction problem.

\(\displaystyle x=-7.66\) 

 

Example Question #484 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle x+333=-724\)

Possible Answers:

\(\displaystyle 391\)

\(\displaystyle 1057\)

\(\displaystyle -476\)

\(\displaystyle -1057\)

\(\displaystyle -391\)

Correct answer:

\(\displaystyle -1057\)

Explanation:

\(\displaystyle x+333=-724\) Subtract \(\displaystyle 333\) on both sides. When adding another negative number, we just take the sum and put a minus sign in front.

\(\displaystyle x=-1057\)

Example Question #485 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle x-49.97=12.03\)

Possible Answers:

\(\displaystyle -37.94\)

\(\displaystyle 54.20\)

\(\displaystyle -42.86\)

\(\displaystyle 62.00\)

\(\displaystyle 72.00\)

Correct answer:

\(\displaystyle 62.00\)

Explanation:

\(\displaystyle x-49.97=12.03\) Add \(\displaystyle 49.97\) on both sides.

\(\displaystyle x=62.00\)

Example Question #483 : Linear Equations

Solve for \(\displaystyle x\).

\(\displaystyle x-456=-219\)

Possible Answers:

\(\displaystyle 426\)

\(\displaystyle 237\)

\(\displaystyle -675\)

\(\displaystyle 675\)

\(\displaystyle -237\)

Correct answer:

\(\displaystyle 237\)

Explanation:

\(\displaystyle x-456=-219\) Add \(\displaystyle 456\) on both sides. Since \(\displaystyle 456\) is greater than \(\displaystyle 219\) and is positive, our answer is positive. We treat as a subtraction problem.

\(\displaystyle x=237\)

Example Question #486 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle x-204.23=-214.58\)

Possible Answers:

\(\displaystyle 20.46\)

\(\displaystyle 15.95\)

\(\displaystyle -13.91\)

\(\displaystyle -10.35\)

\(\displaystyle -12.35\)

Correct answer:

\(\displaystyle -10.35\)

Explanation:

\(\displaystyle x-204.23=-214.58\) Add \(\displaystyle 204.23\) on both sides. Since \(\displaystyle 214.58\) is greater than \(\displaystyle 204.23\) and is negative, our answer is negative. We treat as a subtraction problem.

\(\displaystyle x=-10.35\)

Example Question #481 : Linear Equations

Solve for \(\displaystyle x\).

\(\displaystyle 17x=629\)

Possible Answers:

\(\displaystyle 17\)

\(\displaystyle 47\)

\(\displaystyle 32\)

\(\displaystyle 37\)

\(\displaystyle 27\)

Correct answer:

\(\displaystyle 37\)

Explanation:

\(\displaystyle 17x=629\) Divide \(\displaystyle 17\) on both sides.

\(\displaystyle x=37\)

Example Question #488 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle -28x=896\)

Possible Answers:

\(\displaystyle 42\)

\(\displaystyle 24\)

\(\displaystyle -32\)

\(\displaystyle -26\)

\(\displaystyle 36\)

Correct answer:

\(\displaystyle -32\)

Explanation:

\(\displaystyle -28x=896\) Divide \(\displaystyle -28\) on both sides. When dividing with a positive number, our answer is negative.

\(\displaystyle x=-32\)

Example Question #489 : How To Solve One Step Equations

Solve for \(\displaystyle x\).

\(\displaystyle -13.4x=-30.82\)

Possible Answers:

\(\displaystyle 3.8\)

\(\displaystyle -2.3\)

\(\displaystyle -4.8\)

\(\displaystyle 2.3\)

\(\displaystyle 12.3\)

Correct answer:

\(\displaystyle 2.3\)

Explanation:

\(\displaystyle -13.4x=-30.82\) Divide \(\displaystyle -13.4\) on both sides. When dividing with another negative number, our answer is positive.

\(\displaystyle x=2.3\)

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