1.rozwiąż układy równań  metodą powstawania. a)x+y=3    x-2y=6 B) x-y=5    3x+4y=8 proszę o szybkom pomoc za dobrze rozpisane dam naj

x=3-y x-2y=6 x+y=3 3-y-2y=6 x+y=3 3-3y=6 x+y=3 -3y=3 x+y=3 y=-1 x-1=3 y=-1 x=4 y=-1 b) x=5+y 3(5+y)+4y=8 x-y=5 15+3y+4y=8 x-y=5 7y=-7 x-y=5 y=-1 x+1=5 y=-1 x=4 y=-1

a) {x+y=3 {x-2y=6 {x = 3-y {3-y-2y=6 {x=3-y {-3y=3    /:(-3) {x=3-y {y=-1 {x=3-(-1) {y=-1 {x=4 {y=-1 B) {x-y=5 {3x+4y=8 {x=5+y {3(5+y)+4y=8 {x=5+y {15+3y+4y=8 {x=5+y {7y=-7    /:7 {x=5+y {y=-1 {x=5-1 {y=-1 {x=4 {y=-1