Question

Find two numbers, if
Their sum is 3/5 and their difference is 7 1/5

Answer 1

3.9 and -3.3

Explanation:

Answer 2

Let the numbers be represented by x and y.
.. x + y = 0.6
.. x - y = 7.2
Add these equations to get
.. 2x = 7.8
.. x = 3.9
Then you can find y from
.. y = 0.6 -3.9 = -3.3

The two numbers are -3.3 and 3.9.