Answers

2015-11-26T20:50:10+05:30
T = 10's digit
u = 1's digit
t + u = 11
10u + t = 45 + (10t + u)
Combine like terms: 9u - 9t = 45
Solve by elimination:

9u - 9t = 45
Now, we know that u +t = 11
multiply -9 on both sides...
-9(u+t)=-99
-9u -9t = -99
-18t = -54
t = 3, u = 8
Original number is 38.
0
can u expln how we get -9u-9t=-99?
By multiplying the u+t=11 equation by -9 on both sides