Respuesta :

x+y=9
x-y=7

Sum them together (to eliminate y) and you get:
x+y+x-y=9+7
2x=16
x=8

Plug x into either of the equations and you get that y=1

Answer:

[tex](8,1)[/tex].

Step-by-step explanation:

We have been given a system of equations and we are asked to solve our given system by elimination method.

[tex]x+y=9...(1)[/tex]

[tex]x-y=7...(2)[/tex]

Adding equation 1 and 2 we will get,

[tex]x+x+y-y=9+7[/tex]

[tex]2x=16[/tex]

Upon dividing both sides of our equation by 2 we will get,

[tex]\frac{2x}{2}=\frac{16}{2}[/tex]  

[tex]x=8[/tex]  

Therefore, the value of x is 8.

To solve for y we will subtract equation (2) from equation (1) as:

[tex]x-x+y--y=9-7[/tex]

[tex]y+y=2[/tex]

[tex]2y=2[/tex]

[tex]\frac{2y}{2}=\frac{2}{2}[/tex]

[tex]y=1[/tex]

Therefore, the ordered pair [tex](8,1)[/tex] is the solution for our given system of equations.