3(m+21)=15

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Solution for 3(m+21)=15 equation: 


Simplifying
3(m + 21) = 15

Reorder the terms:
3(21 + m) = 15
(21 * 3 + m * 3) = 15
(63 + 3m) = 15

Solving
63 + 3m = 15

Solving for variable 'm'.

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

Add '-63' to each side of the equation.
63 + -63 + 3m = 15 + -63

Combine like terms: 63 + -63 = 0
0 + 3m = 15 + -63
3m = 15 + -63

Combine like terms: 15 + -63 = -48
3m = -48

Divide each side by '3'.
m = -16

Simplifying
m = -16

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