rozwiaz uklad rownan metoda przeciwnych spolczymikow : a.{ 2x-y=-6 {x-y=-3 b. {2x-5y=9 {3x+y=5 c.{x+3y =4 {2x-y=1 d. { (x-1)kwad.- (y-3)kwadr.=(x-y)(x-y) {1/2(x+4)-1/3(y-4)=1 gory dziekuje;p

a.{ 2x-y=-6 {x-y=-3 /*(-2) { 2x-y=-6 -2x+2y=6 y=0 2x-y=-6 2x-0=-6 2x=-6 x=-3 x=-3 y=0 b. {2x-5y=9 {3x+y=5 /*5 {2x-5y=9 15x+5y=25 17x=34 x=2 15x+5y=25 15*2+5y=25 30+5y=25 5y=25-30 5y=-5 y=-1 x=2 y=-1 c.{x+3y =4 {2x-y=1 /*3 .{x+3y =4 6x-3y=3 7x=7 x=1 6x-3y=3 6*1-3y=3 6-3y=3 -3y=3-6 y=1 x=1 y=1 d. { (x-1)kwad.- (y-3)kwadr.=(x-y)(x-y) {1/2(x+4)-1/3(y-4)=1