81=7x+4x-7

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Solution for 81=7x+4x-7 equation:


Simplifying
81 = 7x + 4x + -7

Reorder the terms:
81 = -7 + 7x + 4x

Combine like terms: 7x + 4x = 11x
81 = -7 + 11x

Solving
81 = -7 + 11x

Solving for variable 'x'.

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

Add '-11x' to each side of the equation.
81 + -11x = -7 + 11x + -11x

Combine like terms: 11x + -11x = 0
81 + -11x = -7 + 0
81 + -11x = -7

Add '-81' to each side of the equation.
81 + -81 + -11x = -7 + -81

Combine like terms: 81 + -81 = 0
0 + -11x = -7 + -81
-11x = -7 + -81

Combine like terms: -7 + -81 = -88
-11x = -88

Divide each side by '-11'.
x = 8

Simplifying
x = 8

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