3+m=21

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Solution for 3+m=21 equation: 


Simplifying
3 + m = 21

Solving
3 + m = 21

Solving for variable 'm'.

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

Add '-3' to each side of the equation.
3 + -3 + m = 21 + -3

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

Combine like terms: 21 + -3 = 18
m = 18

Simplifying
m = 18

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