Question

X + Y is equal to zero equation 1 and 2 x minus Y is equal to 9 equation to solve the following equation in substitution method​

Answer 1

Step-by-step explanation:

SO LETS START

X+Y=0          (1)

2X-Y=9         (2)

BY (1)

X= -Y              (3)    

PUTTING THIS IN (2)

2(-Y)-Y=9

-3Y=9

Y= -3                

NOW PUTTING Y IN (3)

X=-(-3)

X=3

HOPE IT HELPS