4(b+2.5)-2b=21

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Solution for 4(b+2.5)-2b=21 equation: 



4(b+2.5)-2b=21

We move all terms to the left:

4(b+2.5)-2b-(21)=0

We add all the numbers together, and all the variables

-2b+4(b+2.5)-21=0

We multiply parentheses

-2b+4b+10-21=0

We add all the numbers together, and all the variables

2b-11=0

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

2b=11

b=11/2

b=5+1/2

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