Question

5x−3−7x = 15−x What is x?

Answer 1

x = -18

Explanation:

`5x - 3 - 7x = 15 - x \\ collect \: like \: terms \: \\ 5x - 7x + x = 15 + 3 \\ - x = 18`

`( - x)/( - 1) = (18)/( - 1) \\ x = - 18`

Answer 2

Simplify 5x-3-7 to -2x-3
-2x-3=15-x
Add 2x on both sides
−3=15−x+2x
Simplify 15-x+2x to 15+x
−3=15+x
Subtract 15 on both sides
-3-15=x
Simplify -3-15 to -18
-18=x
X=-18