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ahrayia [7]
3 years ago
13

Find the two-digit number which is 2 times the sum of its digits. Find a statement and number, please.

Mathematics
2 answers:
poizon [28]3 years ago
5 0
A two-digit number is twice the sum of its digit. If the tens digit is 7 less than the unit digit, find the number. 
Let x= the unit digit
Then y= the tens digit
<span>And 10y+x= the number 


</span>x+y= the sum of the digits 
<span>Now we are told that 10y+x=2(x+y) ------1st equation </span>
<span>We are also told that y=x-7 ----------- 2nd Equation </span>
<span>So our equations to solve are: </span>
(1) 10y+x=2(x+y)
<span>(2) y=x-7 
</span>

Hope it helps
dusya [7]3 years ago
4 0

Answer:

<em>2(x  + y) = 10x + y</em>

<em>the number is 18</em>

i hop this helps!

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