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15+12-16u=9-16u
We move all terms to the left:
15+12-16u-(9-16u)=0
We add all the numbers together, and all the variables
-16u-(-16u+9)+15+12=0
We add all the numbers together, and all the variables
-16u-(-16u+9)+27=0
We get rid of parentheses
-16u+16u-9+27=0
We add all the numbers together, and all the variables
18!=0
There is no solution for this equation
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