4x+3y=14 z+30y=23 2x-8y+0 8x+15y+108 3x+4y=1i2/3 6x+3y=1i1/4

4x+3y=14 x+30y=23 tu pewnie x? no nic zrobie jako x :) 4x+3y=14 x=23-30y 4*(23-30y)+3y=14 x=23-30y 92-120y+3y=14 x=23-30y -117y=-78 /:-(117) x=23-30y y=2/3 x=23-20 y=2/3 x=3 2x-8y=0 8x+15y=108 2x=8y /:2 8x+15y=108 x=4y 32y+15y=108 x=4y 47y=108 x=4y y=108/47=2 i 14/47 x=9 i 9/47 3x+4y=1i2/3 6x+3y=1i1/4 /:3 3x+4y=1i2/3 2x+y=5/12 3x+4y=1i2/3 y=5/12-2x 3x+5/3-8x=1i2/3 y=5/12-2x -5x=0 ===> x=0 y=5/12