-7/9u=-21

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Solution for -7/9u=-21 equation:



-7/9u=-21
We move all terms to the left:
-7/9u-(-21)=0
Domain of the equation: 9u!=0
u!=0/9
u!=0
u∈R
We add all the numbers together, and all the variables
-7/9u+21=0
We multiply all the terms by the denominator
21*9u-7=0
Wy multiply elements
189u-7=0
We move all terms containing u to the left, all other terms to the right
189u=7
u=7/189
u=1/27

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