How do you solve 7+3x=57+3x=5?

2 Answers
Lithia
Oct 25, 2017

x=-2/3x=−23

Explanation:

7+3x=57+3x=5

So the end goal is to find the value of xx. First we want to isolate xx. In this case we do thi by subtracting 77 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=5-77−7+3x=5−7
3x=-23x=−2

After simplifying, we want to divide both sides of the equation by 33 so that we get the variable by itself.
3/3x=-2/333x=−23
x=-2/3x=−23

Nallasivam V
Oct 25, 2017

x=-2/3x=−23

Explanation:

Given -

7+3x=57+3x=5

Add -7 −7 to both sides

7+3x-7=5-77+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

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