8x+21=5x+81

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Solution for 8x+21=5x+81 equation: 



8x+21=5x+81

We move all terms to the left:

8x+21-(5x+81)=0

We get rid of parentheses

8x-5x-81+21=0

We add all the numbers together, and all the variables

3x-60=0

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

3x=60

x=60/3

x=20

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