30=b-50

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Solution for 30=b-50 equation: 



30=b-50

We move all terms to the left:

30-(b-50)=0

We get rid of parentheses

-b+50+30=0

We add all the numbers together, and all the variables

-1b+80=0

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

-b=-80

b=-80/-1

b=+80

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