Algebra 1 : How to find the solution to an equation

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #11 : Linear / Rational / Variable Equations

Solve the following equation for :

Possible Answers:

Correct answer:

Explanation:

The first step is to distribute (multiply) the 2 through the parentheses:

Then isolate  on the left side of the equation. Subtract the 10 from the left and right side.

Finally, to isolate , divide the left side by 2 so that the 2 cancels out. Then divide by 2 on the right side as well.

You can verify this answer by plugging the  into the original equation.

Example Question #11 : How To Find The Solution To An Equation

Solve for :

Possible Answers:

None of the other answers

Correct answer:

Explanation:

To solve for , isolate it from the other variables. First, subtract  from both sides to get 

.

Then, divide both sides by  to get 

Example Question #12 : How To Find The Solution To An Equation

Solve for :

Possible Answers:

Correct answer:

Explanation:

To solve for , add  to both sides to get 

Then, multiply both sides by  to get 

Example Question #1 : Solve Linear Equations With Rational Number Coefficients: Ccss.Math.Content.8.Ee.C.7b

Solve for :

Possible Answers:

Correct answer:

Explanation:

First, combine like terms within the equation to get 

.

Then, add  and subtract  from both sides to get 

.

Finally, divide both sides by  to get the solution of .

Example Question #13 : How To Find The Solution To An Equation

Solve for :

Possible Answers:

Correct answer:

Explanation:

First, use the distributive property to simplify the right side of the equation. This gives you 

Then, subtract  and add  to both sides of the equation to get .

Example Question #14 : How To Find The Solution To An Equation

Solve for :

Possible Answers:

Correct answer:

Explanation:

First, use the distributive property to simplify the right side of the equation: 

Then, add  and subtract  from both sides to get 

Finally, divide both sides by  to get .

Example Question #1 : Solving Rational Expressions

Solve for , given the equation below.

Possible Answers:

No solutions

Correct answer:

Explanation:

Begin by cross-multiplying.

Distribute the on the left side and expand the polynomial on the right.

Combine like terms and rearrange to set the equation equal to zero.

Now we can isolate and solve for by adding to both sides.

Example Question #15 : How To Find The Solution To An Equation

Simplify the result of the following steps, to be completed in order:

1. Add  to 

2. Multiply the sum by

3. Add  to the product

4. Subtract from the sum

Possible Answers:

Correct answer:

Explanation:

Step 1: 7x + 3y

Step 2: 4 * (7x + 3y) = 28x + 12y

Step 3: 28x + 12y + x = 29x + 12y

Step 4: 29x + 12y – (x – y) = 29x + 12y – x + y = 28x + 13y

Example Question #11 : Systems Of Equations

What is ?

Possible Answers:

The answer cannot be determined.

Correct answer:

Explanation:

The key to solving this question is noticing that we can factor out a 2:

2x + 6y = 44 is the same as 2(x + 3y) = 44.

Therefore, x + 3y = 22.

In this case, x + 3y + 33 is the same as 22 + 33, or 55.

Example Question #11 : How To Find The Solution To An Equation

Solve for .

Possible Answers:

Cannot be determined

Correct answer:

Explanation:

Subtract x from both sides of the second equation.

Divide both sides by  to get .

Plug in y to the other equation.

  

Divide 10 by 5 to eliminate the fraction, yielding .

Distribute the 2 to get .

Add  to each side, and subtract 15 from each side to get .

Divide both sides by 7 to get , which simplifies to .

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