A number consists of two digits whose sum is 8 if 18 is added to that number its digits get interchanged find the number
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Let the no be 10x+y
A. To. Q
x+y=8-------------(1)
10x+y+18=10y+x
9x-9y=-18
x-y=-2---------------(2)
Eq(1) +eq(2)
2x=6
x=3
Put x=3 in eq 1
y=5
So no is 35
A. To. Q
x+y=8-------------(1)
10x+y+18=10y+x
9x-9y=-18
x-y=-2---------------(2)
Eq(1) +eq(2)
2x=6
x=3
Put x=3 in eq 1
y=5
So no is 35
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