Question

15.
A) In a two digit number the sum of the two digits is 6. The difference
between the number of its digits are reversed and original number
is 18 Find the numbers.
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Answer 1

1st digit = x

2nd digit = 6-x

10(x)+(6-x)+18=10(6-x)+(x)

=10x-x+6+18=60-10x+x

=9x+24=60-9x

transporting -9x to left side and 24 on right side

9x+9x=60-24

=18x=36

so,x=36÷18=2

no.=24

hope it helps