(7m+3)+90+(8m-18)=180

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Solution for (7m+3)+90+(8m-18)=180 equation: 



(7m+3)+90+(8m-18)=180

We move all terms to the left:

(7m+3)+90+(8m-18)-(180)=0

We add all the numbers together, and all the variables

(7m+3)+(8m-18)-90=0

We get rid of parentheses

7m+8m+3-18-90=0

We add all the numbers together, and all the variables

15m-105=0

We move all terms containing m to the left, all other terms to the right

15m=105

m=105/15

m=7

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