Rozwiąż równania metoda przeciwnych współczynników!! PRZYKŁADY W ZAŁĄCZNIKU!!!!

a) 3x -4y =6 2x + 2y = 6 /*(-2) 3x -4y =6 -4x -4y = -12 -x = -6 / : (-1) x = 6 x= 6 2*6 + 2y = 6 x=6 2y = -6 /2 x=6 y= -3 b) - 5x - y = -3 / *2 -2x +2y = -6 -10x -2y = -6 -2x +2y = -6 -12x = -12 / : (-12) x = 1 x=1 - 5*1 - y = -3 x=1 -y = 2 /:(-1) x=1 y = -2 c) -x -5y =0 -5x -y = 0 /* (-5) -x -5y =0 25x + 5y = 0 24x = 0 / :24 x= 0 x=0 -0 -5y =0 x=0 -5y=0 x=0 y=0 d) 3/4 x - 2/3y = 2 1/4x + 2/3y = 6 9/12x - 8/12y = 2 / *12 3/12x + 8/12y = 6/ *12 9x -8y = 24 3x + 8y = 72 / *(-1) 9x -8y = 24 -3x - 8y = -72 6x = -48 / :6 x = -8 x=-8 9* (-8) -8y = 24 x=-8 -8y = 96/ (-8) x= -8 y= -12