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-2(m-1)=-22
We move all terms to the left:
-2(m-1)-(-22)=0
We add all the numbers together, and all the variables
-2(m-1)+22=0
We multiply parentheses
-2m+2+22=0
We add all the numbers together, and all the variables
-2m+24=0
We move all terms containing m to the left, all other terms to the right
-2m=-24
m=-24/-2
m=+12
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