81-4x=7-8x

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Solution for 81-4x=7-8x equation:


Simplifying
81 + -4x = 7 + -8x

Solving
81 + -4x = 7 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
81 + -4x + 8x = 7 + -8x + 8x

Combine like terms: -4x + 8x = 4x
81 + 4x = 7 + -8x + 8x

Combine like terms: -8x + 8x = 0
81 + 4x = 7 + 0
81 + 4x = 7

Add '-81' to each side of the equation.
81 + -81 + 4x = 7 + -81

Combine like terms: 81 + -81 = 0
0 + 4x = 7 + -81
4x = 7 + -81

Combine like terms: 7 + -81 = -74
4x = -74

Divide each side by '4'.
x = -18.5

Simplifying
x = -18.5

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