Question

Sum is 9 and diffrence is 7

Answer 1

Hello !!

We need to find two numbers that the sum of both is 9 and the difference is 7. Well, following it we have a linear system.

x + y = 9

x - y = 7

________

x = 9 + 7

x = 16

Now, that you have the value of (x) we will to find the value of y.

x + y = 9

16 + y = 9

y = 9 - 16

y = -7

Therefore, we have that the solution of (x) is 16 and the solution of (y) is -7.

I hope I have collaborated !