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-15=-3/5u
We move all terms to the left:
-15-(-3/5u)=0
Domain of the equation: 5u)!=0We get rid of parentheses
u!=0/1
u!=0
u∈R
3/5u-15=0
We multiply all the terms by the denominator
-15*5u+3=0
Wy multiply elements
-75u+3=0
We move all terms containing u to the left, all other terms to the right
-75u=-3
u=-3/-75
u=1/25
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