m+(m+3m)=90

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Solution for m+(m+3m)=90 equation: 


Simplifying
m + (m + 3m) = 90

Combine like terms: m + 3m = 4m
m + (4m) = 90
m + (4m) = 90

Combine like terms: m + (4m) = 5m
5m = 90

Solving
5m = 90

Solving for variable 'm'.

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

Divide each side by '5'.
m = 18

Simplifying
m = 18

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