Posted by Annabella Richards on Monday, June 20, 2011 at 2:06am.
Find the two digit number such that if you treble it and you take away four times the reverse of that number, the ansswer will be 8.

Maths  Dr Russ, Monday, June 20, 2011 at 10:10am
Start with a number AB which is 10A+B
and the reverse is 10B+A
using the information in the question
3(10A+B)4(10B+A)=8
26A37B=8
Now neither A or B can be zero (0A or 0B is not a valid number)
also we can say that if B>=A then the result is negative.
We can from the equation infer that A is only slightly larger than B
So I tred
A=5 B=3
A=6 B=4
A=7 B=5