How do you solve this

Question

x+3y=0

3x+2y=-7

Answer 1

x + 3y = 0
3x + 2y= -7

 

From the top equation, get

 

x = -3y,

 

and substitute this for x in the bottom equation.  That will leave only the variable y in the bottom equation.  Solve the bottom equation for y, and then plug the value of y into

 

x = -3y

 

to get x.