9u-4=7u+20

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Solution for 9u-4=7u+20 equation: 



9u-4=7u+20

We move all terms to the left:

9u-4-(7u+20)=0

We get rid of parentheses

9u-7u-20-4=0

We add all the numbers together, and all the variables

2u-24=0

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

2u=24

u=24/2

u=12

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