What is the value of x in 5x + 7 = 3x + 13? - ProProfs Discuss
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What is the value of x in 5x + 7 = 3x + 13?



A. 10
B. 5/2
C. 5
D. 3

This question is part of Solving Equations Quiz
Asked by Dhack, Last updated: Apr 06, 2020

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3 Answers

H.Harper

H.Harper

Answered Feb 19, 2020

The correct answer to this question is option D – 3. The value of X in this equation is 3. This is a simple case of algebra where some variables need to be resolved to balance this equation. 5X + 7 = 3X + 13. Rearranging this equation and bringing like terms together is the next state 5X – 3X = 13 - 7. Subtract from both sides 2X = 6. Divide both sides by 2 2X/2 = 6/2, X = 6/2, X = 3

 

L. Sevigny

L. Sevigny, Doctor, Las Vegas

Answered Jan 28, 2019

In algebra, there will be times when you need to solve for x or another variable. The letters are called variables. When you do this, you first need to get the variables all on one side of the equal sign. This means that you get like terms together. Therefore, both variables in this equation should be on the left side of the equation.

To do this, subtract 3x from the right side. Three x minus three x equals zero which is what you want. Then you have to do the same to the other side. Subtract 3x from 5x which is 2x. Then subtract seven from both sides. You should have 2x is equal to 6. Divide by two and x is equal to 3.

 

dhack

Dhack

Answered Oct 23, 2017

3
 

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