{½x-2y=8 2x+5y=6

To jest układ równań: ½x-2y=8 * (-4) 2x+5y=6 -2x + 8y = (-32) 2x + 5y = 6 13y = (-26) y = (-2) y=(-2) 2x + 5y = 6 y=-2 2x - 10 = 6 y = (-2) x = 8 x = 8 y = (-2)

2x-8y=32 2x+5y=6 13y=26 y=2

½x-2y=8} 2x+5y=6} ½x-2y=8 |+2y ½x=8+2y |*2 x=16+4y 2(16+4y)+5y=6 32+8y+5y=6 |-32 13y=-26 |/13 y=-2 ½x+4=8 |-4 ½x=4 |*2 x=8