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-7u=-14/9
We move all terms to the left:
-7u-(-14/9)=0
We get rid of parentheses
-7u+14/9=0
We multiply all the terms by the denominator
-7u*9+14=0
Wy multiply elements
-63u+14=0
We move all terms containing u to the left, all other terms to the right
-63u=-14
u=-14/-63
u=2/9
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