1+m+3=21

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Solution for 1+m+3=21 equation: 


Simplifying
1 + m + 3 = 21

Reorder the terms:
1 + 3 + m = 21

Combine like terms: 1 + 3 = 4
4 + m = 21

Solving
4 + m = 21

Solving for variable 'm'.

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

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

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

Combine like terms: 21 + -4 = 17
m = 17

Simplifying
m = 17

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