3(x-1)=-21

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Solution for 3(x-1)=-21 equation: 


Simplifying
3(x + -1) = -21

Reorder the terms:
3(-1 + x) = -21
(-1 * 3 + x * 3) = -21
(-3 + 3x) = -21

Solving
-3 + 3x = -21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 3x = -21 + 3

Combine like terms: -3 + 3 = 0
0 + 3x = -21 + 3
3x = -21 + 3

Combine like terms: -21 + 3 = -18
3x = -18

Divide each side by '3'.
x = -6

Simplifying
x = -6

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