51-2(m+3)=21

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Solution for 51-2(m+3)=21 equation:


Simplifying
51 + -2(m + 3) = 21

Reorder the terms:
51 + -2(3 + m) = 21
51 + (3 * -2 + m * -2) = 21
51 + (-6 + -2m) = 21

Combine like terms: 51 + -6 = 45
45 + -2m = 21

Solving
45 + -2m = 21

Solving for variable 'm'.

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

Add '-45' to each side of the equation.
45 + -45 + -2m = 21 + -45

Combine like terms: 45 + -45 = 0
0 + -2m = 21 + -45
-2m = 21 + -45

Combine like terms: 21 + -45 = -24
-2m = -24

Divide each side by '-2'.
m = 12

Simplifying
m = 12

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