25=7-2b

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Solution for 25=7-2b equation: 



25=7-2b

We move all terms to the left:

25-(7-2b)=0

We add all the numbers together, and all the variables

-(-2b+7)+25=0

We get rid of parentheses

2b-7+25=0

We add all the numbers together, and all the variables

2b+18=0

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

2b=-18

b=-18/2

b=-9

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