Question 96920
There is simple way to do the problem:
x = 100's, y = 10's, z = 1,s
:
From the phrase "5 times the old number" we know that the 1st number x = 1:
(5 times any other hundreds number would not be 3 digit number)
:
" The sum of the digits of a three-digit number is 11." therefore:
y + z = 10
:
" If the hundreds digit plus twice the tens digit is equal to the units digit,"
1 + 2y = z
y - z = -1
:
Add to the 1st equation
y + z = 10
2y- z = -1
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3y = 9
y = 3
:
Obviously z = 7
:
then what is the number.   137
0 solutions