Sagot :
3x + 4y = 5
-5x - 4y = -11
-2x = -6
-2x = -6
-2 -2
x = 3
3(3) + 4y = 5
9 + 4y = 5
-9 -9
4y = -4
4y = -4
4 4
y = -1
(x, y) = (3, -1)
-5x - 4y = -11
-2x = -6
-2x = -6
-2 -2
x = 3
3(3) + 4y = 5
9 + 4y = 5
-9 -9
4y = -4
4y = -4
4 4
y = -1
(x, y) = (3, -1)