a) -3x = 2x - 10 -3x-2x=-10 -5x=-10/:(-5) x=2 b) 2x - 2 = 7 - x 2x+x=7+2 3x=9/:3 x=3 c) 10 = 4 - 2x 10-4=-2x 6=-2x/:(-2) -3=x d) - (2x - 1) = 4 -2x+1=4 -2x=4-1 -2x=3/:(-2) x=-1,5 e) 2 (x + 1) = x 2x+2=x/-2x 2=-x/^(-1) x=-2 f) 2t - (3t + 1) = 6 2t-3t-3=6 -t=6+3 -t=9/^(-1) t=-9 g) - (4 + x) = 2(3-x) -4-x=6-2x -x+2x=6+4 x=10 h) 3(y + 6) - y = 2(y + 9) 3y+18-y=2y+18 2y+18=2y+18 y może być każdą liczbą!!! i) (x - 7) - 2(3x + 5) = 3 x-7-6x-10=3 -5x-17=3/+17 -5x=20/:(-5) x=-4
a)-3x=2x-10 -3x-2x=-10 -5x=-10/: (15) x=2 b) 2x-2=7-x 2x+x=7+2 3x=9/: 3 x = 3 c)10 = 4 - 2x 2x=4-10 2x=-6/: 2 x=-3 d) - (2x - 1) = 4 -2x+1=4 -2x=4-1 -2x=3/: (-2) x=-1½ e) 2 (x + 1) = x 2x+2=x 2x-x=-2 x=-2 f) 2t - (3t + 1) = 6 2t-3t-1=6 2t-3t=6+1 -1t=7/: (-1) t=-7 g) - (4 + x) = 2(3-x) -4-x=6-2x -x+2x=4+6 x=10 h) 3(y + 6) - y = 2(y + 9) 3y+18-y=2y+18 3y-y-2y=18-18 y=0 i) (x - 7) - 2(3x + 5) = 3 x-7-6x-10=3 x-6x=7+10+3 -5x=20/:(-5) x= -4
a) -3x = 2x - 10 -3x - 2x = -10 -5x = -10 : -5 x = 2 b) 2x-2 = 7 - x 3x = 9 : 3 x = 3 c) 10 = 4 - 2x 2x = -6 :2 x = -3 d) - (2x - 1) = 4 - 2x + 1 = 4 - 2x = 3 : (-2) x = -1,5 e) 2 (x+1) = x x = -1 f) 2t - (3t + 1) = 6 2t - 3t - 1 = 6 -1t = 7 : (-1) t = -7 g) - (4 + x) = 2 (3 - x) - 4 - x = 6 - 2x x = 10 h) 3 (y + 6) - y = 2(y + 9) 3y + 18 - y = 2y + 18 0 = 0 równanie tożsamościowe i) (x - 7) - 2(3x + 5) = 3 x - 7 - 6x - 10 = 3 -5x = 20 : (-5) x = - 4