2/3(u)+5/3(u)=21

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Solution for 2/3(u)+5/3(u)=21 equation: 



2/3(u)+5/3(u)=21

We move all terms to the left:

2/3(u)+5/3(u)-(21)=0



Domain of the equation: 3u!=0

u!=0/3

u!=0

u∈R



We multiply all the terms by the denominator


-21*3u+2+5=0

We add all the numbers together, and all the variables

-21*3u+7=0

Wy multiply elements

-63u+7=0

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

-63u=-7

u=-7/-63

u=1/9

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