4x-4+5x=77

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Solution for 4x-4+5x=77 equation: 


Simplifying
4x + -4 + 5x = 77

Reorder the terms:
-4 + 4x + 5x = 77

Combine like terms: 4x + 5x = 9x
-4 + 9x = 77

Solving
-4 + 9x = 77

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 9x = 77 + 4

Combine like terms: -4 + 4 = 0
0 + 9x = 77 + 4
9x = 77 + 4

Combine like terms: 77 + 4 = 81
9x = 81

Divide each side by '9'.
x = 9

Simplifying
x = 9

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