Answer:
u=5
Explanation:
multiply 9 by u and 2 you will get 9u+18=63
subtract 18 from both sides of the equation you will get 9u=45
divide both side by 9 and you will get your answer, u=5
u = 5
9(u+2) = 63
9(5+2) = 63
9(7)=63
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