Question

A two-digit number is obtained by either multiplying the sum of the digits by 8 and then subtracting 7 or by multiplying the difference of the digits by 18 and then adding 1. Find the number. (Assume that
ten's digit is greater than units digit.)​

Answer 1

Answer:

Two digits number=x

sum of digits=x+8

x+x+8=7-18

2x+8=-11

2x=-11-8

2x=-19

x=-19/2

x=-9.5

Two digits number=x=-9.5

sum of digits=x+8

-9.5+8=-8.7