the sum of the digit of 2 digit number is 9. the numbe ris 6 time the unit digit . find the number
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let number be xy
x+y=9
10x+y=6y
10x=5y
2x=y
x+y=9
x+2x=9
3x=9
x=3
y=9-3=6
so the number is 36
x+y=9
10x+y=6y
10x=5y
2x=y
x+y=9
x+2x=9
3x=9
x=3
y=9-3=6
so the number is 36
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