-31-4x=9-9x

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Solution for -31-4x=9-9x equation:


Simplifying
-31 + -4x = 9 + -9x

Solving
-31 + -4x = 9 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
-31 + -4x + 9x = 9 + -9x + 9x

Combine like terms: -4x + 9x = 5x
-31 + 5x = 9 + -9x + 9x

Combine like terms: -9x + 9x = 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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