Solve for u
u=7
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u+63-10u=0
Subtract 10u from both sides.
-9u+63=0
Combine u and -10u to get -9u.
-9u=-63
Subtract 63 from both sides. Anything subtracted from zero gives its negation.
u=\frac{-63}{-9}
Divide both sides by -9.
u=7
Divide -63 by -9 to get 7.
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Matrix
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Limits
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