Układy równań za 120 punktów-pilne! (3 zadania ale mozesz zrobić 2)

Zad. 2x - y = 1 2x - 3y = 2x = y + 1 2x - 3y = 2x = y + 1 2*(y+1) - 3y = 2x = y + 1 2y + 2 - 3y = 2A) NIE B) - y = 1 -x => y = x - 1 -> TAK 2x - 3y = 2 2x -3(x-1) = 2 => 2x -3x + 3 = 2B) TAKC) TAKD) x = y + 1 --> TAK 2y - 3y = 2 - 2 -> TAKD) TAK       Zad. 5y = 5x + 1 10x - 2y + 2 = 0A=(-2,-9) -9 = 5*(-2) + 1   ==> -9 = -10 + 1 ==> -9 = -9 ==> PRAWDA 10*(-2) - 2*(-9) + 2 = 0 ==> -20 + 18 + 2 = 0 ==> -20 + 20 = 0 ==> 0=0 ==> PRAWDAB=(3,14) 14 = 5*3 + 1 ==> 14 = 15 + 1 ==> 14 = 16 ==> FAŁSZ 10*3 - 2*14 + 2 = 0 ==> 30 - 28 + 2 = 0 ==> 2 + 2 =0 ==> 4 = 0 ==> FAŁSZC=(0,1) 1 = 5*0 + 1 ==> 1 = 0 + 1 ==> 1 = 1 ==> PRAWDA 10*0 - 2*1 + 2 = 0 ==> 0 - 2 + 2 = 0 ==> 0 = 0 ==> PRAWDA D=(-4,-19) -19 = 5*(-4) + 1 ==> -19 = -20 + 1 ==> -19 = -19 ==> PRAWDA 10*(-4) - 2*(-19) + 2 = 0 ==> -40 + 38 + 2 = 0 ==> 0 = 0 ==> PRAWDA  Odp. Nie, ponieważ B