help jak to rozwiązać :( 2x+4y=91 100x+100y=32

2x= 91-4y x=45,5 - 2y 100(45,5-2y)+100y=32 4550-200y+100y=32 4518=100y y= 45,18 x=45,5- 2(45,18)= -44,86

2x+4y=91 /*(-25) 100x+100y=32 -50x-100y=-2275 100x+100y=32 __________________ 50x=-2275+32 50x=-2243 /:50 x=-44,86 x=-44,86 2x+4y=91 x=-44,86 2*(-44,86)+4y=91 x=-44,86 -89,72+4y=91 x=-44,86 4y=91+89,72 x=-44,86 4y=180,72 /:4 x=-44,86 y=45,18