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2.5=-2b+9.88
We move all terms to the left:
2.5-(-2b+9.88)=0
We get rid of parentheses
2b-9.88+2.5=0
We add all the numbers together, and all the variables
2b-7.38=0
We move all terms containing b to the left, all other terms to the right
2b=7.38
b=7.38/2
b=3+1/1.4492753623188
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