3=-7+b/2

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Solution for 3=-7+b/2 equation: 



3=-7+b/2

We move all terms to the left:

3-(-7+b/2)=0

We add all the numbers together, and all the variables

-(b/2-7)+3=0

We get rid of parentheses

-b/2+7+3=0

We multiply all the terms by the denominator


-b+7*2+3*2=0

We add all the numbers together, and all the variables

-1b+20=0

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

-b=-20

b=-20/-1

b=+20

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