3x+39=13x-81

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Solution for 3x+39=13x-81 equation:


Simplifying
3x + 39 = 13x + -81

Reorder the terms:
39 + 3x = 13x + -81

Reorder the terms:
39 + 3x = -81 + 13x

Solving
39 + 3x = -81 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
39 + 3x + -13x = -81 + 13x + -13x

Combine like terms: 3x + -13x = -10x
39 + -10x = -81 + 13x + -13x

Combine like terms: 13x + -13x = 0
39 + -10x = -81 + 0
39 + -10x = -81

Add '-39' to each side of the equation.
39 + -39 + -10x = -81 + -39

Combine like terms: 39 + -39 = 0
0 + -10x = -81 + -39
-10x = -81 + -39

Combine like terms: -81 + -39 = -120
-10x = -120

Divide each side by '-10'.
x = 12

Simplifying
x = 12

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