20x+9=12x-31

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Solution for 20x+9=12x-31 equation:


Simplifying
20x + 9 = 12x + -31

Reorder the terms:
9 + 20x = 12x + -31

Reorder the terms:
9 + 20x = -31 + 12x

Solving
9 + 20x = -31 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
9 + 20x + -12x = -31 + 12x + -12x

Combine like terms: 20x + -12x = 8x
9 + 8x = -31 + 12x + -12x

Combine like terms: 12x + -12x = 0
9 + 8x = -31 + 0
9 + 8x = -31

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

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

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

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

Simplifying
x = -5

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