8(u-3)-3u=21

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Solution for 8(u-3)-3u=21 equation: 



8(u-3)-3u=21

We move all terms to the left:

8(u-3)-3u-(21)=0

We add all the numbers together, and all the variables

-3u+8(u-3)-21=0

We multiply parentheses

-3u+8u-24-21=0

We add all the numbers together, and all the variables

5u-45=0

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

5u=45

u=45/5

u=9

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