zadanie 9 str 183 matematyka z plusem 1 gimnazjum prosze o pomoc

zad 9 a) 1/3x - 2 = x +2 / * 3 x - 6 = 3x + 6 x - 3x = 6 + 6 - 2x = 12 2x = - 12 x = - 12/2 = - 6 b)  1 - 6/7x = 4/7 / * 7 7 - 6x = 4 - 6x = 4 - 7 - 6x = - 3 6x = 3 x = 3/6 = 1/3 c)  6(1/4x - 2) = 18 6/4x - 12 = 18 / * 4 6x - 48 = 72 6x = 72 + 48 = 120 x = 120/6 = 20 d) x/6 - 1/6 = 1 / * 6 x - 1 = 6 x = 6 + 1 x = 7 e) - 2(2x - 1) = x/3 / * 3 - 2 * 3(2x - 1) = x  - 6(2x - 1) = x - 12x + 6 = x - 12x - x = - 6 - 13x = - 6 13x = 6 x = 6/13 f) 2/3(3 - x) = - 2 / * 3 2(3 - x) = - 6 6 - 2x = - 6 - 2x = - 6 - 6 - 2x = - 12 2x = 12 x = 12/2 = 6 g) 3/4(2 - 3x) = - 6 / * 4 3(2 - 3x) = - 24 6 - 9x = - 24 - 9x = - 24 - 6 - 9x = - 30 9x = 30 x = 30/9 = 10/3 = 3 1/3 h)  1/5(x - 3) = 9 - x / * 5 x - 3 = 5(9 - x) x -3 = 45 - 5x 5x + x = 45 + 3 6x = 48 x = 48/6 = 8 i) (0,6 + x)/2 = x + 1 / * 2 0,6 + x = 2(x + 1) 0,6 + x = 2x + 2 x - 2x = 2 - 0,6 - x = 1,4 x = - 1,4

a) -1/3x-2=x+2 /+2     1/3x=x+4 /-x      -2/3x=4 /:2/3      x=4*(3/2)= -6 b)1-6/7x=4/7 /-1     6/7x=3/7 /:6/7      x= 3/7*7/6=1/2 c)6(1/4x-2)=18    6/4x-12= 18/+12    6/4x=30    x=30*4/6=20 d)x/6-1/=1 /+1/6    x/6=1 1/6 /*6    x=7/6*6=7 e)-2 (2x-1)=x/3    -4x+2=x/3 /*3    -12x+6=x /-6    -13x=-6 /:(-13)    x=6/13 f)2/5 (3-x)=-2 /:2/5   3-x=-5 /-3   -x=-8 /*(-1)   x=6/13 g)3/4(2-3x)=-6    6/4-9/4x=-6    -2 1/4= -6-1 1/2    -9/4x=-7 1/2    -9/4x= -15/2 /* (-4/9)    x=10/3= 3 1/3 h)1/5 (x-3)=9-x     1/5x-3/5=9-x /+3/5     1/5x+x=9+3/5     1 1/5=9 3/5      6/5x=48/5 /*5/6      x=8 i)0,6+x /2=x+1   1,8+3x=6x+6 /1,8   3x-6x=6-1,8   -3x=-4,2   x=-1,4 To jest napewno dobrze bo robiłam to w szkole. Licze na naj