SAT II Math I : Solving Equations

Study concepts, example questions & explanations for SAT II Math I

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Example Questions

Example Question #174 : Sat Subject Test In Math I

Solve for .

Possible Answers:

Correct answer:

Explanation:

To isolate the variable in the equation, perform the opposite operation to move all constants on one side of the equation and leaving the variable on the other side of the equation.

 

Add  on both sides. Since  is greater than  and is positive, our answer is positive. We treat as a normal subtraction.

 

Multiply  on both sides.

Example Question #172 : Sat Subject Test In Math I

Solve for .

Possible Answers:

Correct answer:

Explanation:

To isolate the variable in the equation, perform the opposite operation to move all constants on one side of the equation and leaving the variable on the other side of the equation.

 

Add  to both sides. Since  is greater than  and is negative, our answer is negative. We treat as a normal subtraction.

 

When multiplying with another negative number, our answer is positive.

Example Question #21 : Single Variable Algebra

Possible Answers:

Correct answer:

Explanation:

To isolate the variable in the equation, perform the opposite operation to move all constants on one side of the equation and leaving the variable on the other side of the equation.

 

To get rid of the radical, we square both sides.

Example Question #22 : Single Variable Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

To isolate the variable in the equation, perform the opposite operation to move all constants on one side of the equation and leaving the variable on the other side of the equation.

 

To get rid of the radical, we square both sides.

 

Subtract  on both sides.

Example Question #23 : Single Variable Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

To isolate the variable in the equation, perform the opposite operation to move all constants on one side of the equation and leaving the variable on the other side of the equation.

 

Take the square root on both sides.  Remember when you do that, you need to take account of the negative as well. Two negatives multipied is a positive number.

Example Question #21 : Single Variable Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

To isolate the variable in the equation, perform the opposite operation to move all constants on one side of the equation and leaving the variable on the other side of the equation.

 

This is a quadratic equation. We need to find two terms that are factors of the c term that add up to the b term.

In this case, we should have 

Solve each binomial individually. 

 Subtract  on both sides. 

 Subtract  on both sides. 

Answers are .

Example Question #22 : Single Variable Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Subtract  on both sides.

Example Question #13 : Solving Equations

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Subtract  on both sides. Since  is greater than  and is negative, our answer is negative. We treat as a normal subtraction.

Example Question #23 : Single Variable Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Add  to both sides.

Example Question #24 : Single Variable Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

 Add  on both sides. Since  is greater than  and is negative, our answer is negative. We treat as a normal subtraction.

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