1. {2x+3y=18 {x+y=7 /*-2 {-2x-2y=-14 +{2x+3y=18 y=4 2x+3*4=18 2x=6 {x=3 {y=4 2. {4x-3y=26 {x+y=-3 /*-4 {-4x-4y=12 +{4x-3y=26 7y=38 y=5 3/38 -4x-4*5 3/38=12 -4x=12+20 {x=-8 {y=5 i 3/38 3. {4x+3y=10 /*3 {3x+4y=11 /*-4 {12x+9y=30 +{-12x-16y=-44 7y=-14 y=-2 12x+9*-2=30 12x=48 {x=4 {y=-2
1. {2x+3y=18 {x+y=7 / *(-2) {2x+3y=18 {-2x-2y=-14 {y=4 {x+y=7 {x+4=7 /-4 {x=3 {x=3 {y=4 2. {4x-3y=26 {x+y=-3 / * (-4) {4x-3y=26 {-4x-4y=12 {-7y=38 / : (-7) {y=38/-7 {y=-5 i 3/7 {x+y=-3 {x+(-5)3/7=-3 / + 5 całych i 3/7 {x=2 i 3/7 {x=2 i 3/7 {y=-5 i 3/7 3. {4x+3y=10 / *3 {3x+4y=11 / *(-4) {12x+9y=30 {-12x-16y=-44 { -7y=-14 / :(-7) { y=2 {4x+3y=10 {4x+3*2=10 {4x+6=10 /-6 {4x=4 / :4 {x=1 {x=1 {y=2
