-3x + 2y = 18
3x - 4y = 23
(-3x + 2y) + (3x - 4y) = 18 + 23
-3x + 2y + 3x - 4y = 18 + 23
-2y = 41
y = -41/2
-3x - 41 = 18
-3x = 59.
x = -59/3
ответ: (-59/3; -41/2)
-3x + 2y = 18
3x - 4y = 23
(-3x + 2y) + (3x - 4y) = 18 + 23
-3x + 2y + 3x - 4y = 18 + 23
-2y = 41
y = -41/2
-3x - 41 = 18
-3x = 59.
x = -59/3
ответ: (-59/3; -41/2)