High School Math : How to solve two-step equations with integers in pre-algebra

Study concepts, example questions & explanations for High School Math

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Example Questions

Example Question #61 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  if

Possible Answers:

Correct answer:

Explanation:

To perform a two-step algebra problem with addition and multiplication we must remove the numbers from  so it is by itself on one side of the equation.

To do this we first look to see if a number is being added or subtracted from .

In this case a number is being added so we must subtract the number, , from each side of the equation.

Perform the math so our equation looks like  

Then we divide each side of the equation by the number that is in front of  to get  by itself 

Perform the math to find the answer 

Example Question #62 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  if

Possible Answers:

Correct answer:

Explanation:

The problem above is a two-step algebra problem with distribution.

To solve you must first distribute the  outside of the parentheses to both of the numbers inside the parentheses by multiplying.

Perform the multiplication with  and each of the numbers inside the parentheses to get our new equation, 

Then we must get our variable, , by itself.

We must subtract the number, , from each side of the equation 

Perform the math so our equation looks like 

Then we divide each side of the equation by the number that is in front of  to get  by itself 

Solve to find the answer 

Example Question #61 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  if

Possible Answers:

Correct answer:

Explanation:

When there are variables and numbers on each side of the equation, to solve we must mathematically move the variables onto one side and the numbers onto the other.

To do this we put all of the variables on the right side of the equal sign by subtracting  from each side of the equation to have 

When adding or subtracting variables you only add or subtract the numbers in front of the variables. If there is no number the number value is .

Perform the math 

Then to get all of the integers to the left side we will add  to both sides of the equation to have 

Perform the math.

At this point we must divide each side of the equation by the number that is in front of  to get  by itself 

Perform the math to find the answer 

Example Question #64 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for :

Possible Answers:

Correct answer:

Explanation:

Example Question #65 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

 

Example Question #61 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  when 

Possible Answers:

Correct answer:

Explanation:

To solve for , begin by adding  to both sides of the equation:

Then multiply both sides by :

Example Question #67 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  when 

Possible Answers:

Correct answer:

Explanation:

To solve for , begin by subtracting  from both sides of the equation:

Then divide both sides by :

Example Question #68 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  when 

Possible Answers:

Correct answer:

Explanation:

When there are variables on both sides of the equation, it is easiest to move them to the same side. Move all variables to the left side of the equation by subtracting  from each side:

Then subtract  from each side of the equation:

Then divide each side by :

Example Question #69 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  when 

Possible Answers:

Correct answer:

Explanation:

To solve for , begin by adding  to both sides of the equation:

Then divide both sides of the equation by :

Example Question #70 : How To Solve Two Step Equations With Integers In Pre Algebra

Solve for  when 

Possible Answers:

Correct answer:

Explanation:

When there are variables on both sides of the equation, it is easiest to move them to the same side. Move all variables to the right side of the equation by subtracting  from each side:

Then add  to both sides of the equation:

Then divide each side of the equation by :

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