(1.5b+3)+b+(2b-9)+15=90

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Solution for (1.5b+3)+b+(2b-9)+15=90 equation: 



(1.5b+3)+b+(2b-9)+15=90

We move all terms to the left:

(1.5b+3)+b+(2b-9)+15-(90)=0

We add all the numbers together, and all the variables

b+(1.5b+3)+(2b-9)-75=0

We get rid of parentheses

b+1.5b+2b+3-9-75=0

We add all the numbers together, and all the variables

4.5b-81=0

We move all terms containing b to the left, all other terms to the right

4.5b=81

b=81/4.5

b=18

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