8-x+7-3x=31

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Solution for 8-x+7-3x=31 equation:


Simplifying
8 + -1x + 7 + -3x = 31

Reorder the terms:
8 + 7 + -1x + -3x = 31

Combine like terms: 8 + 7 = 15
15 + -1x + -3x = 31

Combine like terms: -1x + -3x = -4x
15 + -4x = 31

Solving
15 + -4x = 31

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-15' to each side of the equation.
15 + -15 + -4x = 31 + -15

Combine like terms: 15 + -15 = 0
0 + -4x = 31 + -15
-4x = 31 + -15

Combine like terms: 31 + -15 = 16
-4x = 16

Divide each side by '-4'.
x = -4

Simplifying
x = -4

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