please answer this question 12
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fimd the following attachment
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yeah exactly (2,1)&(1,2)
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let the digits of the no. be x and y
therefore .... x+y=3. ...(1)
and. 7(10x+y)=4(10y+x)
66x-33y=0
2x-y=0. ...(2)
adding both(1) & (2) , we get
3x=3
x =1
therefore ..y =2
hence the number is 12
therefore .... x+y=3. ...(1)
and. 7(10x+y)=4(10y+x)
66x-33y=0
2x-y=0. ...(2)
adding both(1) & (2) , we get
3x=3
x =1
therefore ..y =2
hence the number is 12
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