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5(u-4)-7u=18
We move all terms to the left:
5(u-4)-7u-(18)=0
We add all the numbers together, and all the variables
-7u+5(u-4)-18=0
We multiply parentheses
-7u+5u-20-18=0
We add all the numbers together, and all the variables
-2u-38=0
We move all terms containing u to the left, all other terms to the right
-2u=38
u=38/-2
u=-19
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