9x+4=x-8

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Solution for 9x+4=x-8 equation:


Simplifying
9x + 4 = x + -8

Reorder the terms:
4 + 9x = x + -8

Reorder the terms:
4 + 9x = -8 + x

Solving
4 + 9x = -8 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
4 + 9x + -1x = -8 + x + -1x

Combine like terms: 9x + -1x = 8x
4 + 8x = -8 + x + -1x

Combine like terms: x + -1x = 0
4 + 8x = -8 + 0
4 + 8x = -8

Add '-4' to each side of the equation.
4 + -4 + 8x = -8 + -4

Combine like terms: 4 + -4 = 0
0 + 8x = -8 + -4
8x = -8 + -4

Combine like terms: -8 + -4 = -12
8x = -12

Divide each side by '8'.
x = -1.5

Simplifying
x = -1.5

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