1) {2x-3y=2 {x+y=1 |×3 {2x-3y=2 {3x+3y=3 dodawanie 5x=5 x=1 1+y=1 y=0 2) {3x-2y=1 {x+y=2 |×2 {3x-2y=1 {2x+2y=4 dodawanie 5x=5 x=1 1+y=2 y=1 3) {3x-2y=1 |×2 {x+4y=5 {6x-4y=2 {x+4y=5 dodawanie 7x=7 x=1 1+4y=5 y=1 4) {2x-3y=1 |×2 {x+6y=8 {4x-6y=2 {x+6y=8 dodawanie 5x=10 x=2 2+6y=8 6y=6 y=1
A){2x-3y-2 {x+y-1 {2x-3y-2 {x=1-y {2(1-y)-3y-2 {x=1-y {2-2y-3y-2 {x=1-y {2-2=3y-2y {x=1-y {0=5y {x=1-y {5y=0 /:5 {x=1-y {y=0 {x=1-y
1. {2x-3y=2 {x+y=1 /*(-2) {2x-3y=2 + {-2x-2y=1 ____________ -5y=3 /:(-5) y=3/5 (ułamek) {x+3/5=1 {y=3/5 {x=1-3/5 {y=3/5 {x=2/5 {y=3/5 2.{3x-2y=1 {x+y=2 /*2 {3x-2y=1 + {2x+2y=4 ___________ 5x=5 /:5 x=1 {1+y=2 {x=1 {y=2-1 {x=1 {y=1 {x=1 3.{3x-2y=1 /*2 {x+4y=5 {6x-4y=2 + {x+4y=5 __________ 7x=7 /:7 x=1 {1+4y=5 {x=1 {4y=5-1 {x=1 {4y=4 /:4 {x=1 {x=1 {y=1 4.{2x-3y=1 /*2 {x+6y=8 {4x-6y=2 + {x+6y=8 ___________ 5x=10 /:5 x=5 {5+6y=8 {x=5 {6y=8-5 {x=5 {6y=3 /:6 {x=5 {x=5 {y=3/6(ułamek) {x=5 {y=1/2(ułamek)
