5u-21=3(u-1)

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Solution for 5u-21=3(u-1) equation: 



5u-21=3(u-1)

We move all terms to the left:

5u-21-(3(u-1))=0



We calculate terms in parentheses: -(3(u-1)), so:

3(u-1)

We multiply parentheses

3u-3

Back to the equation:

-(3u-3)



We get rid of parentheses

5u-3u+3-21=0

We add all the numbers together, and all the variables

2u-18=0

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

2u=18

u=18/2

u=9

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