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145=-12+5b
We move all terms to the left:
145-(-12+5b)=0
We add all the numbers together, and all the variables
-(5b-12)+145=0
We get rid of parentheses
-5b+12+145=0
We add all the numbers together, and all the variables
-5b+157=0
We move all terms containing b to the left, all other terms to the right
-5b=-157
b=-157/-5
b=31+2/5
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