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2*1+12=4+b
We move all terms to the left:
2*1+12-(4+b)=0
We add all the numbers together, and all the variables
-(b+4)+12+2*1=0
We add all the numbers together, and all the variables
-(b+4)+14=0
We get rid of parentheses
-b-4+14=0
We add all the numbers together, and all the variables
-1b+10=0
We move all terms containing b to the left, all other terms to the right
-b=-10
b=-10/-1
b=+10
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