Ligninger

22 a b c d e f g h -x = -8 -x = 6 -2x = 14 -3x = -6 -x+5 = 3 8-x = 5 -4x+8 = 12 -2x+8 = -20 => => => => => => => => x=8 x = -6 2x/-2 = 14/-2 -3x/-3 = -6/-3 -x = 3-5 -x = 5-8 -4x = 12-8 => -4x = 4 -2x = -16 = = = = = = = = x=8 x = -6 x=2 x=2 x = -2 x=3 x = -1 x = -8

23 a b c d e f g h 8 = 5-x 12 = x+8 4 = 6+x -3x = 2x+10 5x = 7x+4 x = 5x+8 2x -5 = 7x 3= 2x+9 => => => => => => => => -3x-2x = 10 => -5x =10 -2x = 4 4x = -8 5x = -5 2x = -6 3 = -x = = = = = = = = x=3 x=4 x = -2 x = -2 x = -2 x = -2 x = -1 x = -3

24 a b c d e f g h 4x-2 = 5 2x-5 = 2 3x-8 = 2 2x = 4x-7 3x+5 = 0 2x-9 = 10 3x+2 = 4 3x = x+5 => => => => => => => => 4x = 7 => x = 7/4 2x = 7 => x = 7/2 3x = 10 => x = 10/3 2x = 7 => x = 7/2 3x = -5 => x = -5/3 2x = 19 3x = 2 2x = 5 = = = = = = = = x = 1 3/4 x=3½ x = 3 1/3 x = 3½ X = 1 2/3 x=9½ X = 2/3 x=2½