Question 409692: A two-digit number is four times the sum of its digits. The tens digit is 3 less than the units digit. What is the number? Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! Let t=the tens digit and u=the units digit.
10t+u=4(t+u)
u=t+3
.
10t+t+3=4t+4(t+3) Substitute t+3 for u.
11t+3=4t+4t+12
3t=9
t=3
u=6
.
Ed
