m-3(m-7)=

Solution for m-3(m-7)= equation:

Simplifying
m + -3(m + -7) = 0

Reorder the terms:
m + -3(-7 + m) = 0
m + (-7 * -3 + m * -3) = 0
m + (21 + -3m) = 0

Reorder the terms:
21 + m + -3m = 0

Combine like terms: m + -3m = -2m
21 + -2m = 0

Solving
21 + -2m = 0

Solving for variable 'm'.

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

Add '-21' to each side of the equation.
21 + -21 + -2m = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -2m = 0 + -21
-2m = 0 + -21

Combine like terms: 0 + -21 = -21
-2m = -21

Divide each side by '-2'.
m = 10.5

Simplifying
m = 10.5