13x+8=9x-20

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Solution for 13x+8=9x-20 equation:


Simplifying
13x + 8 = 9x + -20

Reorder the terms:
8 + 13x = 9x + -20

Reorder the terms:
8 + 13x = -20 + 9x

Solving
8 + 13x = -20 + 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.
8 + 13x + -9x = -20 + 9x + -9x

Combine like terms: 13x + -9x = 4x
8 + 4x = -20 + 9x + -9x

Combine like terms: 9x + -9x = 0
8 + 4x = -20 + 0
8 + 4x = -20

Add '-8' to each side of the equation.
8 + -8 + 4x = -20 + -8

Combine like terms: 8 + -8 = 0
0 + 4x = -20 + -8
4x = -20 + -8

Combine like terms: -20 + -8 = -28
4x = -28

Divide each side by '4'.
x = -7

Simplifying
x = -7

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