selesaikan dari sistem persamaan 2x + 3y -1 = 0 dan x - 3y -5 = 0 pakai cara

2x + 3y - 1 = 0 ===> 2x + 3y = 1
x   + 3y - 5 = 0 ===> x   + 3y = 5

eliminasi:
2x + 3y = 1
x   + 3y = 5 
----------------- (-)
x = -4

substitusi:
x   + 3y = 5
-4 + 3y =5
3y = 5 + 4
3y = 9
y = 9/3 = 3

jadi jawabannya x = -4 dan y = 3