7u-9=4(u-9)

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Solution for 7u-9=4(u-9) equation: 



7u-9=4(u-9)

We move all terms to the left:

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



We calculate terms in parentheses: -(4(u-9)), so:

4(u-9)

We multiply parentheses

4u-36

Back to the equation:

-(4u-36)



We get rid of parentheses

7u-4u+36-9=0

We add all the numbers together, and all the variables

3u+27=0

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

3u=-27

u=-27/3

u=-9

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