A number consist of two digits whose sum is 9.if the digits are reversed,the new number is 3/8of the first number.find the number.
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Answer:
unit place digit be x and tenth place digit be y
number 10y+x
Step-by-step explanation:
x+y=9.. ..1)
reversing digit
new number=10x+y
10x+y=3/8 (10y+x)
80x+8y=30y+3x
77x=22y
7x=2y
7x=2(9-x) from 1)
9x=18
x=2
y=9-2=7
number 72
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