5(b-81)=20

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Solution for 5(b-81)=20 equation: 



5(b-81)=20

We move all terms to the left:

5(b-81)-(20)=0

We multiply parentheses

5b-405-20=0

We add all the numbers together, and all the variables

5b-425=0

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

5b=425

b=425/5

b=85

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