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+140=M+.05M
We move all terms to the left:
+140-(M+.05M)=0
We add all the numbers together, and all the variables
-(+1.05M)+140=0
We get rid of parentheses
-1.05M+140=0
We move all terms containing M to the left, all other terms to the right
-1.05M=-140
M=-140/-1.05
M=133+0.34999999999999/1.05
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