1. x - y = 9
2. x + y = 18
Adding 1. & 2. gives:
3. 2x = 27
x = 27/2
x = 13.5
Substituting x = 13.5 into 1. gives:
13.5 - y = 9
y = 13.5 - 9
y = 4.5
The two numbers are therefore 13.5 & 4.5.
[8] and [10].
They are 10 and 8
13 and 5
8 and 10
Jeez that's easy 12 and 18
10 and 8
18 & 42
The numbers are 18 and 12
[8] and [10].
18 and 12
They are 10 and 8
6 and 6
the 2 numbers are pp and caca
13 and 5
8 and 10
Jeez that's easy 12 and 18
The numbers are 18 and -17 because 18-(-17) = 35 and 18+(-17) = 1