3x+4+4x=81

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Solution for 3x+4+4x=81 equation: 


Simplifying
3x + 4 + 4x = 81

Reorder the terms:
4 + 3x + 4x = 81

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

Solving
4 + 7x = 81

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 + 7x = 81 + -4

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

Combine like terms: 81 + -4 = 77
7x = 77

Divide each side by '7'.
x = 11

Simplifying
x = 11

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