-3/8u=-21

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Solution for -3/8u=-21 equation: 



-3/8u=-21

We move all terms to the left:

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



Domain of the equation: 8u!=0

u!=0/8

u!=0

u∈R



We add all the numbers together, and all the variables

-3/8u+21=0

We multiply all the terms by the denominator


21*8u-3=0

Wy multiply elements

168u-3=0

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

168u=3

u=3/168

u=1/56

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