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(+10)2M+M=180
We move all terms to the left:
(+10)2M+M-(180)=0
We add all the numbers together, and all the variables
102M+M-180=0
We add all the numbers together, and all the variables
103M-180=0
We move all terms containing M to the left, all other terms to the right
103M=180
M=180/103
M=1+77/103
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