4(x-1)=81

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Solution for 4(x-1)=81 equation: 


Simplifying
4(x + -1) = 81

Reorder the terms:
4(-1 + x) = 81
(-1 * 4 + x * 4) = 81
(-4 + 4x) = 81

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

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

Combine like terms: 81 + 4 = 85
4x = 85

Divide each side by '4'.
x = 21.25

Simplifying
x = 21.25

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