7(m-1)=-21

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


Simplifying
7(m + -1) = -21

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

Solving
-7 + 7m = -21

Solving for variable 'm'.

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

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

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

Combine like terms: -21 + 7 = -14
7m = -14

Divide each side by '7'.
m = -2

Simplifying
m = -2

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