Question

Rezolvati in multimea N ecuatia: a)3(1-2x)+8=32; b)60:(3y+2)=12 c)1-3(8x-4)=1 d)1605+4(3-x)=2011

Answer 1

a) 3(1 - 2x) + 8 = 32
    3 - 6x = 32 - 8
    - 6x = 24 - 3
    x = - 21/6 = - 7/2
b) 60 : (3y + 2) = 12
    12(3y + 2) = 60
    36y + 24 = 60
    36y = 60 - 24
    y = 36/36
    y = 1
c) 1 - 3(8x - 4) = 1
    1 - 24x + 12 = 1
    - 24x = 1 - 1 - 12
    x = 12/24
    x = 1/2
d)1605 + 4(3 - x) = 2011
   12 - 4x = 2011 - 1605
   - 4x = 406 - 12
   x = - 394/4
   x = 197/2