How do you solve 7+3x=5?

2 Answers
Oct 25, 2017

x=-2/3

Explanation:

7+3x=5

So the end goal is to find the value of x. First we want to isolate x. In this case we do thi by subtracting 7 on both sides of the equation. Because what we do to one side of an equation, we do to the other side as well. Then simplify.
7-7+3x=5-7
3x=-2

After simplifying, we want to divide both sides of the equation by 3 so that we get the variable by itself.
3/3x=-2/3
x=-2/3

Oct 25, 2017

x=-2/3

Explanation:

Given -

7+3x=5

Add -7 to both sides

7+3x-7=5-7

cancel7+3xcancel(-7)=-2

Divide both sides by 3

(3x)/3=(-2)/3

(cancel(3)x)/cancel(3)=(-2)/3

x=-2/3