Question

Sum of two numbers is 15 , their difference is
7 What are the numbens ?
Let the numbers be x, y
sum is 15
x+y=?
difference =?
x-y=?
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Answer 1

Answer:

I have mentioned the answer in the pic...

hope it helps..

Answer 2

Answer:

let the numbers be x and y

x+y =15...(i)

x-y=7...(ii)

adding (i) and (ii)

we get x=22

and putting the value of xin equation (i)

x+y=15

22+y=15

y=15-22

y=-7

hope this helps you.