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b=-7/2
We move all terms to the left:
b-(-7/2)=0
We get rid of parentheses
b+7/2=0
We multiply all the terms by the denominator
b*2+7=0
Wy multiply elements
2b+7=0
We move all terms containing b to the left, all other terms to the right
2b=-7
b=-7/2
b=-3+1/2
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