Question

find three no.such that sum of 1st and 2nd is 40. sum of 1st and 3rd is 58.sum of 2nd and 3rd is 68.

Answer 1

x=15

y=25

z=43

this is the answer of your question

Answer 2

Let the three numbers be x, y, and z

now according to question

x + y = 40

x + z = 58

y + z = 68

Now add all we get

2 ( x + y + z ) = 166

so, x + y + z = 83

from above x + y = 40

so z = 43

Accordingly you can find y and z

Hope it was useful.