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aliya0001 [1]
3 years ago
15

the tens digit of a two digit number is twice the units digit. The sum of the digits is twelve. Find the original number.

Mathematics
1 answer:
KatRina [158]3 years ago
4 0
X - tens digit
y - units digit

x=2y\\
x+y=12\\\\
2y+y=12\\
3y=12\\
y=4\\\\
x=2\cdot4\\
x=8\\\\
10\cdot8+4=\boxed{84}

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