Zad 1
a) 3x - 2y = 0
2y = 3x-0
6y - 10x - 4 = 0
3(3x - 0) - 10x - 4 = 0
9x + 0 - 10x = 4
-1x = 4
x = -4
2y = 3 * (-4) - 0
2y = -12
y = -6
d) 2x - y = 16
y = 2x - 16
(x(x + 1) - (x + 2)² = 2x - 16 - 3
(x + 1 + x²) - x² + 4 = 2x - 19
x - 3 = 2x - 19
x - 2x = -19 + 3
-x = -16
x = 16
y = 32 - 16 = 16
c) -x + 2y = -3
2x - 4y = 0
to nie wychodzi
b)
½ x - ¼y = 4 / *4
2x - y = 16
y = 2x - 16
to wychodzi dalej tak samo jak w d