4+7x-2x=81

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Solution for 4+7x-2x=81 equation: 


Simplifying
4 + 7x + -2x = 81

Combine like terms: 7x + -2x = 5x
4 + 5x = 81

Solving
4 + 5x = 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 + 5x = 81 + -4

Combine like terms: 4 + -4 = 0
0 + 5x = 81 + -4
5x = 81 + -4

Combine like terms: 81 + -4 = 77
5x = 77

Divide each side by '5'.
x = 15.4

Simplifying
x = 15.4

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