15/7=-3u

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Solution for 15/7=-3u equation: 



15/7=-3u

We move all terms to the left:

15/7-(-3u)=0

We get rid of parentheses

3u+15/7=0

We multiply all the terms by the denominator


3u*7+15=0

Wy multiply elements

21u+15=0

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

21u=-15

u=-15/21

u=-5/7

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