Răspuns:
c) (x-3) : 2/3 = 2/3
(x-3) = 2/3 × 2/3
(x-3) = 4/9
x = 4/9 + 3
x = 31/9 = 3,(4)
f) 5x/6 + x = - 11/4
Numitor comun 12
10x + 12x = - 33
22x = - 33
2x = - 3
x = - 3/2 = - 1,5
b) 2/5 - 2x/5 = 4/25 × 2/5
- 2x/5 = 8/125 - 2/5
- 2x/5 = - 42/125
- 250x = - 210
25x = 21
x = 21/25 = 0,84
d) 3/7 + 3x/7 = - 1 × 7/3
3x/7 = - 7/3 - 3/7
3x/7 = - 58/21
63x = - 406
x = - 406/63 = 6,(4)
