7/2u=-21

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Solution for 7/2u=-21 equation: 



7/2u=-21

We move all terms to the left:

7/2u-(-21)=0



Domain of the equation: 2u!=0

u!=0/2

u!=0

u∈R



We add all the numbers together, and all the variables

7/2u+21=0

We multiply all the terms by the denominator


21*2u+7=0

Wy multiply elements

42u+7=0

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

42u=-7

u=-7/42

u=-1/6

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