Question

X+y=0 ; 2x-y=9 solve this problem

Answer 1

Step-by-step explanation:

2x-y=9

x+y=0((-y) and (y) so they canceled

2x=9

x=0

-------

3x=9

x=9÷3

x=3

_________

finding y

2x-y=9

2×3-y=9

6-y=9

6-9=y

-3=y