3x + 2y = 0 || 9x - 24 = 2y
(*(-1)
-3x + (-2y) = -0
-3x - 2y = 0
-3x = 2y ->> 9x - 24 = -3x
+3x
12x - 24 = 0
12x = 24
x = 2 9(*2) - 24 = 2y -> 18-24 = 2y -> -6=2y -> -3 = y
Test:
3*(2) + 2*(-3) = 0
6 + (-6) = 0 <--- stimmt
9*(2) - 24 = 2*(-3)
18-24 = -6 <--- stimmt