-42=-7/2u

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Solution for -42=-7/2u equation: 



-42=-7/2u

We move all terms to the left:

-42-(-7/2u)=0



Domain of the equation: 2u)!=0

u!=0/1

u!=0

u∈R



We get rid of parentheses

7/2u-42=0

We multiply all the terms by the denominator


-42*2u+7=0

Wy multiply elements

-84u+7=0

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

-84u=-7

u=-7/-84

u=1/12

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