-9-2x+7x=31

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Solution for -9-2x+7x=31 equation: 


Simplifying
-9 + -2x + 7x = 31

Combine like terms: -2x + 7x = 5x
-9 + 5x = 31

Solving
-9 + 5x = 31

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 5x = 31 + 9

Combine like terms: -9 + 9 = 0
0 + 5x = 31 + 9
5x = 31 + 9

Combine like terms: 31 + 9 = 40
5x = 40

Divide each side by '5'.
x = 8

Simplifying
x = 8

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