5(4x+5)=81

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Solution for 5(4x+5)=81 equation: 



5(4x+5)=81

We move all terms to the left:

5(4x+5)-(81)=0

We multiply parentheses

20x+25-81=0

We add all the numbers together, and all the variables

20x-56=0

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

20x=56

x=56/20

x=2+4/5

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