21+6m=2(m-1)

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Solution for 21+6m=2(m-1) equation:


Simplifying
21 + 6m = 2(m + -1)

Reorder the terms:
21 + 6m = 2(-1 + m)
21 + 6m = (-1 * 2 + m * 2)
21 + 6m = (-2 + 2m)

Solving
21 + 6m = -2 + 2m

Solving for variable 'm'.

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

Add '-2m' to each side of the equation.
21 + 6m + -2m = -2 + 2m + -2m

Combine like terms: 6m + -2m = 4m
21 + 4m = -2 + 2m + -2m

Combine like terms: 2m + -2m = 0
21 + 4m = -2 + 0
21 + 4m = -2

Add '-21' to each side of the equation.
21 + -21 + 4m = -2 + -21

Combine like terms: 21 + -21 = 0
0 + 4m = -2 + -21
4m = -2 + -21

Combine like terms: -2 + -21 = -23
4m = -23

Divide each side by '4'.
m = -5.75

Simplifying
m = -5.75

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