Question

C,f,b,d va rog mult

Answer 1

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)