a number consist of two digits who sum is 9. if the digits reversd the new number is 3 apone 8 of the first number the number
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Answer:
let the digits are x and y
x+y=9
new numer is 10y+x
10y+x=3/8(10x+y)
Step-by-step explanation:
80y+8x=30x+3y
77y=22x
y=22x/77=2x/7
so x+2x/7=9
9x=9×7
x=7, y=9-7=2
so the number is 72
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