-31=3x+9-8x

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Solution for -31=3x+9-8x equation:


Simplifying
-31 = 3x + 9 + -8x

Reorder the terms:
-31 = 9 + 3x + -8x

Combine like terms: 3x + -8x = -5x
-31 = 9 + -5x

Solving
-31 = 9 + -5x

Solving for variable 'x'.

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

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

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

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

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

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

Divide each side by '5'.
x = 8

Simplifying
x = 8

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