a) 2x+3_5 = 2-x_3 - x *5 2x+3=10x/3-5x *3 6x+3= 10x - 15x 3=-11x /-11 x= -0,(27) b) x+1_2 - x-1_3 = 1_4 *6 x+1/2 *6 - x-1/3 *6 = 3/2 3x+3- 2x-2=3/2 x=3/2+1 x=2.5 c) 4x+7_2 - 5x-1_6 = x+5 *6 12x+21-5x-1=6x+30 x=10 d) x+5_4 - 2x+1_8 = 1_2(2-x) *8 2x+10-2x-1=8-4x 4x=-1 /4 x= -0.25
a) 2x + 3 _ 5 = 2 - x _ 3 - x/razy 15 30x + 9 = 30 - 5x - 15x 30x + 5x + 15x = 30 - 9 50x = 21/ :50 x = 0,42 b) x + 1_2 - x - 1_3 = 1_4 / razy 12 12x + 6 - 12x - 4 = 3 12x -12x = 3 -6 + 4 0 = 1 - chyba źle przepisałeś c) 4x+7_2 - 5x-1_6 = x+5 4x - 5x - x = 5 - 7_2 + 1_6 -2x = 5 - 7_2 + 1_6 / razy 12 - 24x = 60 - 42 + 2 - 24x = 20 / : (-24) x = 0,8(3) d) x+5_4 - 2x+1_8 = 1_2(2-x) x - 2x + 0,5x = 1 - 1_8 - 5_4 - 0,5x = 1 - 1_8 - 5_4 / razy 8 -4x=8 - 1 - 10 - 4x = - 3 / : (-4) x = 0,75
