Question

a) 1/2 x + 1/3 = 3x + / * 6 b) 3(x-2 ) -3x = 10x c) -1/3 ( x+2 ) -1/2 (x-3 )=x

Answer 1

pierwsze jest z błędnym zapisem

 

b) 3(x-2 ) -3x = 10x

3x-6-3x=10x

-10x = 6    /:(-10

x = - 6/10 = - 3/5

 

 

c) -1/3 ( x+2 ) -1/2  (x-3 )=x

-1/3x-2/3-1/2x+3/2 = x

-1/3x-1/2x-x = -3/2+2/3

-2/6x-3/6x-x=-9/6+4/6

- 11/6x = - 5/6     /*(-6/11)

x = 5/11