80-4x=9x+15

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Solution for 80-4x=9x+15 equation:


Simplifying
80 + -4x = 9x + 15

Reorder the terms:
80 + -4x = 15 + 9x

Solving
80 + -4x = 15 + 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.
80 + -4x + -9x = 15 + 9x + -9x

Combine like terms: -4x + -9x = -13x
80 + -13x = 15 + 9x + -9x

Combine like terms: 9x + -9x = 0
80 + -13x = 15 + 0
80 + -13x = 15

Add '-80' to each side of the equation.
80 + -80 + -13x = 15 + -80

Combine like terms: 80 + -80 = 0
0 + -13x = 15 + -80
-13x = 15 + -80

Combine like terms: 15 + -80 = -65
-13x = -65

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

Simplifying
x = 5

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