Answer:
y = 5
x = 9
Step-by-step explanation:
multiple the second equation by 4 then add both equations up
4×(x -3y = -6 ) ➡ 4x - 12y = -24
4x -12y - 4x +9y = 9 - 24 ➡ -3y = -15
y = 5 use this value to find x
x - 3×5 = -6
x = -6 + 15
