4[x-1]=20

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Solution for 4[x-1]=20 equation: 


Simplifying
4[x + -1] = 20

Reorder the terms:
4[-1 + x] = 20
[-1 * 4 + x * 4] = 20
[-4 + 4x] = 20

Solving
-4 + 4x = 20

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 = 20 + 4

Combine like terms: -4 + 4 = 0
0 + 4x = 20 + 4
4x = 20 + 4

Combine like terms: 20 + 4 = 24
4x = 24

Divide each side by '4'.
x = 6

Simplifying
x = 6

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