21=-7m

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Solution for 21=-7m equation:


Simplifying
21 = -7m

Solving
21 = -7m

Solving for variable 'm'.

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

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

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

Add '-21' to each side of the equation.
21 + -21 + 7m = 0 + -21

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

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

Divide each side by '7'.
m = -3

Simplifying
m = -3

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