2(5-b)=20

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Solution for 2(5-b)=20 equation: 



2(5-b)=20

We move all terms to the left:

2(5-b)-(20)=0

We add all the numbers together, and all the variables

2(-1b+5)-20=0

We multiply parentheses

-2b+10-20=0

We add all the numbers together, and all the variables

-2b-10=0

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

-2b=10

b=10/-2

b=-5

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