27+9b=90

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Solution for 27+9b=90 equation: 



27+9b=90

We move all terms to the left:

27+9b-(90)=0

We add all the numbers together, and all the variables

9b-63=0

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

9b=63

b=63/9

b=7

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