Question

Solve the substitution simultaneous equation x+3y=0 and x-3y=6

Answer 1

Answer:

y=-9/2 , x= -15/2

Step-by-step explanation:

x+3y=0 ⇒x+3=y ⇒x=y-3

x-3y=6

substitute x in equation 2,

x-3y=6

⇒ y-3-3y = 6

⇒ -2y-3= 6

⇒-2y= 9

⇒ y=-9/2

substitute y in any of the equation to get x,

x=y-3

⇒ x= -9/2-3

⇒ x= -15/2