9u=5u-4

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Solution for 9u=5u-4 equation: 



9u=5u-4

We move all terms to the left:

9u-(5u-4)=0

We get rid of parentheses

9u-5u+4=0

We add all the numbers together, and all the variables

4u+4=0

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

4u=-4

u=-4/4

u=-1

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