86-4x=9x+21

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Solution for 86-4x=9x+21 equation:


Simplifying
86 + -4x = 9x + 21

Reorder the terms:
86 + -4x = 21 + 9x

Solving
86 + -4x = 21 + 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.
86 + -4x + -9x = 21 + 9x + -9x

Combine like terms: -4x + -9x = -13x
86 + -13x = 21 + 9x + -9x

Combine like terms: 9x + -9x = 0
86 + -13x = 21 + 0
86 + -13x = 21

Add '-86' to each side of the equation.
86 + -86 + -13x = 21 + -86

Combine like terms: 86 + -86 = 0
0 + -13x = 21 + -86
-13x = 21 + -86

Combine like terms: 21 + -86 = -65
-13x = -65

Divide each side by '-13'.
x = 5

Simplifying
x = 5

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