18=8u+7+24u-21

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Solution for 18=8u+7+24u-21 equation: 



18=8u+7+24u-21

We move all terms to the left:

18-(8u+7+24u-21)=0

We add all the numbers together, and all the variables

-(32u-14)+18=0

We get rid of parentheses

-32u+14+18=0

We add all the numbers together, and all the variables

-32u+32=0

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

-32u=-32

u=-32/-32

u=1

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