Question

Testul 43 >
1. Determinati-l pex din:
2x7+ {2*2*1 x [2 x 7 x 2 + (x*1+1 * 2): (2 x 1 x 3)]-5}:5*1 =1x7+3 x 2x5.​

Answer 1

Răspuns:

2x7+ {2*2*1 x [2 x 7 x 2 + (x*1+1 * 2): (2 x 1 x 3)]-5}:5*1 =1x7+3 x 2x5.

14+ {4*1 x [14 x 2 + (x*1+2): (2 x 3)]-5}:5*1 =7+6x5

14+ {4 x [28+ (x*1+2): 6]-5}:5*1 =7 + 30

14+ {4 x [28+ (x*1+2): 6]-5}:5*1 = 37

{4 x [28+ (x*1+2): 6]-5}:5*1 = 37 - 14

{4 x [28+ (x*1+2): 6]-5}:5*1 = 23

{4 x [28+ (x*1+2): 6]-5}:5 = 23 : 1

{4 x [28+ (x*1+2): 6]-5}:5 = 23

4 x [28+ (x*1+2): 6]-5 = 23 × 5

4 x [28+ (x*1+2): 6]-5 = 115

4 x [28+ (x*1+2): 6] = 115 + 5

4 x [28+ (x*1+2): 6] = 120

28+ (x*1+2): 6 = 120 : 4

28+ (x*1+2): 6 = 30

(x*1+2): 6 = 30 - 28

(x*1+2): 6 = 2

x*1+2 = 2 × 6

x*1+2 = 12

x*1 = 12 - 2

x*1 = 10

x = 10 : 1

x = 10