5u-20=7u-80

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Solution for 5u-20=7u-80 equation: 



5u-20=7u-80

We move all terms to the left:

5u-20-(7u-80)=0

We get rid of parentheses

5u-7u+80-20=0

We add all the numbers together, and all the variables

-2u+60=0

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

-2u=-60

u=-60/-2

u=+30

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