easy · GMAT Quant
A two-digit number has tens digit t and units digit u, and the number equals 9 times the sum of its digits.
Which equation correctly represents this relationship?
- tu = 9(t + u)
- 10t + u = 9(t + u)
- 10t + u = 9tu
- t + u = 9(10t + u)
- 10u + t = 9(t + u)
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