A) 2(X+1/2)-2/3(3-6X)=X+2 B)5X-6(X+7)=8X-9(10+X) C)0,1(X-10)-0,6X=1,5X-4

a) 2(x + 1/2) - 2/3(3 - 6x) = x + 2 2x + 1 - 2 + 4x = x + 2 2x + 4x - x = 2 - 1 + 2 5x = 3 x = 3/5 b) 5x - 6( x + 7) = 8x - 9(10 + x) 5x - 6x - 42 = 8x - 90 - 9x 5x - 6x - 8x + 9x = 90 + 42 0 = 132 c) 0,1(x - 10) - 0,6x = 1,5x - 4 0,1x - 1 - 0,6x = 1,5x - 4 0,1x - 0,6x - 1,5x = - 4 + 1 - 2x = - 3 x = 3/2

a) 2(x + 1/2) - 2/3 (3 - 6x) = x + 2 2x + 1 - 2 + 12x = x + 2 2x + 12x - x = 2 - 1 + 2 13x = 3 x = 3/13 b) 5x - 6 (x + 7) = 8x - 9 (10 + x) 5x - 6x - 42 = 8x - 90 - 9x 5x - 6x - 8x + 9x = -90 + 42 0 = -48 równanie sprzeczne c) 0,1 (x - 10) - 0,6x = 1,5x - 4 0,1x - 1 - 0,6x = 1,5x - 4 0,1x - 0,6x - 1,5x = -4 + 1 -2x = -3 x = (-3) : (-2) x = 1,5