-31=2x-3(-2x-3)

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Solution for -31=2x-3(-2x-3) equation:


Simplifying
-31 = 2x + -3(-2x + -3)

Reorder the terms:
-31 = 2x + -3(-3 + -2x)
-31 = 2x + (-3 * -3 + -2x * -3)
-31 = 2x + (9 + 6x)

Reorder the terms:
-31 = 9 + 2x + 6x

Combine like terms: 2x + 6x = 8x
-31 = 9 + 8x

Solving
-31 = 9 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-31 + -8x = 9 + 8x + -8x

Combine like terms: 8x + -8x = 0
-31 + -8x = 9 + 0
-31 + -8x = 9

Add '31' to each side of the equation.
-31 + 31 + -8x = 9 + 31

Combine like terms: -31 + 31 = 0
0 + -8x = 9 + 31
-8x = 9 + 31

Combine like terms: 9 + 31 = 40
-8x = 40

Divide each side by '-8'.
x = -5

Simplifying
x = -5

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