2(40+b)=180

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Solution for 2(40+b)=180 equation: 



2(40+b)=180

We move all terms to the left:

2(40+b)-(180)=0

We add all the numbers together, and all the variables

2(b+40)-180=0

We multiply parentheses

2b+80-180=0

We add all the numbers together, and all the variables

2b-100=0

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

2b=100

b=100/2

b=50

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