a.[x+3y=o [y-x=4 /×3 {x+3y=0 {3x-3y=12 4x=12 /:4 x=3 b.{x-5y=-2 [2x+y=-4 /×5 {x-5y=-2 {10x+5y=20 11x=18 /:11 x=1,63 c. {x-3y=0 {x+y=-4 /×3 {x-3y=0 {3x+3y=-12 4x=-12/:4 x=-3 d. [x+y=-4 /×3 {2x-3y=2 {3x+3y=-12 {2x-3y=2 5x=-10 /:5 x=-2 e.{2x-y=-4 /×(-2) [x-2y=7 {-4x+2y=8 {x-2y=7 -3x=15 /:(-3) x=-5 f.{2x+y=3 {x-y=9 /×(-2) {2x+y=3 {-2x+2y=-18 3y=-15 /:3 y=-5
4y=4 y=1 x+3=0 x=-3 y=1 --------------------------------- x=-2+5y 2(-2+5y)+y=-4 x=-2+5y -4+10y+y=-4 11y=0 y=0 x=-2+0 x=-2 --------------------------------- x+3y=0 -x-y=4 2y=4 y=2 x+6=0 x=-6 ------------------------------- X+y=-4 / * (-2) 2x-3y=2 -2x-2y=8 2x-3y=2 -5y=10 /: (-5) y=-2 x-2=-4 {x=-2 {y=-4 ---------------------------------------- -4-2y=8 x+2y=7 -3x=15 /:-3 x=-5 2* -5 + y=-4 -10+y=-4 {x=-2 {y=-2 ---------------------------------------- 2x+y=3 x-y=9 3x=12 /:3 x=4 2*4+y=3 8+y=3 y=-5 x=4
Wybacz nie chcialo mi sie pisac ;p masz skan ;]
