7x-9=4x-81

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Solution for 7x-9=4x-81 equation:


Simplifying
7x + -9 = 4x + -81

Reorder the terms:
-9 + 7x = 4x + -81

Reorder the terms:
-9 + 7x = -81 + 4x

Solving
-9 + 7x = -81 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-9 + 7x + -4x = -81 + 4x + -4x

Combine like terms: 7x + -4x = 3x
-9 + 3x = -81 + 4x + -4x

Combine like terms: 4x + -4x = 0
-9 + 3x = -81 + 0
-9 + 3x = -81

Add '9' to each side of the equation.
-9 + 9 + 3x = -81 + 9

Combine like terms: -9 + 9 = 0
0 + 3x = -81 + 9
3x = -81 + 9

Combine like terms: -81 + 9 = -72
3x = -72

Divide each side by '3'.
x = -24

Simplifying
x = -24

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