1. {2x-4(y+1)=10 {2(x+3)-(1-y)=9 {2x-4y-4=10 {2x+6-1+y=9 {2x-4y-4=10 {y=-2x+4 {2x-4*(-2x+4)-4=10 {y=-2x+4 {2x+8x-16-4=10 {y=-2x+4 {10x=30/ :10 {y=-2x+4 {x=3 {y=-2*3+4 {x=3 {y=-2 2. {11k+17n=45 {13k+n=15 {11k+17n=45 {n=-13k+15 {11k+17(-13k+15)=45 {n=-13k+15 {11k-221k+255=45 {n=-13k+15 {-210k=-210/:(-210) {n=-13k+15 {k=1 {n=-13+15 {k=1 {n=2 3. {2x-y=10 {x=-17-4y {2(-17-4y)-y=10 {x=-17-4y {-34-8y-y=10 {x=-17-4y {9x=44/:(-9) {x=-17-4y {x= -4całe i 8/9 {-4 8/9= -17-4y {x=-4 8/9 {4y=-17+4 8/9 {x=-4 8/9 {y= -109/9 *¼= 109/36 {x=- 4 8/9 {y=-3 1/36 :)
