-7(x-1)=-21

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Solution for -7(x-1)=-21 equation: 


Simplifying
-7(x + -1) = -21

Reorder the terms:
-7(-1 + x) = -21
(-1 * -7 + x * -7) = -21
(7 + -7x) = -21

Solving
7 + -7x = -21

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + -7x = -21 + -7

Combine like terms: 7 + -7 = 0
0 + -7x = -21 + -7
-7x = -21 + -7

Combine like terms: -21 + -7 = -28
-7x = -28

Divide each side by '-7'.
x = 4

Simplifying
x = 4

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