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1.3=m-2.5
We move all terms to the left:
1.3-(m-2.5)=0
We get rid of parentheses
-m+2.5+1.3=0
We add all the numbers together, and all the variables
-1m+3.8=0
We move all terms containing m to the left, all other terms to the right
-m=-3.8
m=-3.8/-1
m=3+0.8/1
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