Podręcznik Matematyka z plusem 2 zadanie 3 storna 107 a) { 2x-1/2y=3 {y-4x=-6 b) {x-y=3 {-5+10y=10 c) {6x+y=3 {3x+1/2y=5 d) {x-2y=-4 {0,5x+y=2 Potrzebuje zależy mi na czasie

a) {2x - 1/2y = 3 {y - 4x = -6 {2x - 1/2y = 2 {y = 6 + 4x {2x - 1/2y (6+4x) = 3 {y = 6 + 4x {2x - 3 - 2x = 3 {y = 6 + 4x {y = 6+4x {0 = 6 b) {x-y = 3 /*5 {-5x+10y = -10 {5x - 5y = 15 {-5 + 10y = - 10 5y = 5 /:5 y = 1 5x - 5*1 = 15 5x-5=15 5x=15-5 5x=10 /:5 x=2 Mam tylko tyle..

Ciąg dalszy.. c) {6x + y = 3 {3x + 1/2y = 5 /*-2 { 6x + y = 3 + {-6x - y =-10 0 = -7 d) {x - 2y = -4 {0,5x + y = 2 / *2 {x - 2y = -4 +{x + 2y = 4 2x = 0 -2y = -4 / *1 2y = 4 /:2 y = 2