u/7+18=21

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Solution for u/7+18=21 equation: 



u/7+18=21

We move all terms to the left:

u/7+18-(21)=0

We add all the numbers together, and all the variables

u/7-3=0

We multiply all the terms by the denominator


u-3*7=0

We add all the numbers together, and all the variables

u-21=0

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

u=21

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