Question

System of equations

Answer 1

The solution of the system of equations is the point (-3,0)

Explanation:

we have

`-3x+y=9` -----> equation A

`2x-y=-6` -----> equation B

Adds equation A and equation B

`-3x+y=9\\2x-y=-6\\------\\-3x+2x=9-6\\-x=3\\x=-3`

Find the value of y

`-3(-3)+y=9`

`9+y=9`

`y=9-9=0`

The solution of the system of equations is the point (-3,0)