Rozwiąż układ równań: { 6x+7y =54 {7x+6y =50 SZYBKO ;p

{ 6x+7y =54|*6 {7x+6y =50|*(-7) 36x+42y=324 -49x-42y=-350 -13x=-26 x=2 6*2+7y=54 7y=42 y=6

-x + y = 4 y = 4 + x 6x +7 (4+x) = 54 6x + 28 + 7x = 54 13x = 54 - 28 13x = 26 x = 2 6x + 7y = 54 6 * 2 + 7y = 54 12 + 7y = 54 7y = 54 - 12 7y = 42 y =6 x=2 y=6