30b+40=250

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Solution for 30b+40=250 equation: 



30b+40=250

We move all terms to the left:

30b+40-(250)=0

We add all the numbers together, and all the variables

30b-210=0

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

30b=210

b=210/30

b=7

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