Math, asked by gurudutt2253, 1 year ago

a two digit number is 7 times the sum of its digit. if the difference between two digit is 2 ,find the number

Answers

Answered by Anonymous
0
HEY DEAR ... ✌️


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Here's ur answer :-


Let the unit's digit be x .

There fore , ten's digit will be ( x + 2 ) .

There fore , the number is 10 ( x + 2 ) + x 
= 10 x + 20 + x
= 11 x + 20 .

According to the question ,


11 x + 20 = 7 ( x + x + 2 )

=> 11 x + 20 = 14 x + 14 

=> 3 x = 6 

=> x = 2 .

There fore , units digit = 2 .

So , tens digit = 4 . 

So the number is 42.

But it can also be the other way round , that is ,

units digit be 4 and tens digit be 2 .

In that case, the number will be 24 .


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HOPE , IT HELPS ... ✌️
Answered by starjustice
0
10x+y=7(x+y)
x-2y=0
x-y=2
y=2
x=4
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