Answer: {y,x} = {-8,-2} // Solve equation [2] for the variable y
[2] y = x - 6
// Plug this in for variable y in equation [1]
[1] (x -6) - 3x = -2
[1] - 2x = 4
// Solve equation [1] for the variable x
[1] 2x = - 4
[1] x = - 2
// By now we know this much :
y = x-6
x = -2
// Use the x value to solve for y
y = (-2)-6 = -8 Solution : {y,x} = {-8,-2}
