Solve for u
u=0
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7u+15=15
Add 1 and 14 to get 15.
7u=15-15
Subtract 15 from both sides.
7u=0
Subtract 15 from 15 to get 0.
u=0
Product of two numbers is equal to 0 if at least one of them is 0. Since 7 is not equal to 0, u must be equal to 0.
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