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erma4kov [3.2K]
4 years ago
10

The tens digit of a number is twice the ones digit. The sum of the digits in the number is 12. What is the number?

Mathematics
2 answers:
zysi [14]4 years ago
5 0
84. 4•2=8 8+4=12. The second digit must be less than 5 to create a single digit answer for your tens place.
arlik [135]4 years ago
4 0
Let x = the ones digit
Let y = the tens digit

x+2y=12
x=2y
x+y=12 substitute x for 2y to get:
(2y)+y=12 add like terms to get:
3y=12
3y=12 divide both sides by 3 to get:
y=4
x+y=12 substitute y for 4 to get:
x+4=12 subtract 4 from both sides to get:
x=8
so if x=ones
and y=tens
<span>then the answer is 48</span>
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