Question

repede rapid va rog doar h) ,i) si j)​

Answer 1

Răspuns:

h) [3 + 4 x (6 x a -1)] :47 +9 = 10

[3 + 4 x (6 x a - 1 ) :47 = 10-9 = 1

3 + 4 x ( 6 x a - 1 ) = 47 x 1 = 47

4 x ( 6 x a -1 ) = 47 - 3 = 44

6 x a - 1 = 44 : 4 = 11

6 x a = 11+1 = 12

a = 12 : 6

a = 6

i)  2 x [3 + 5 x ( 2 x a - 1 )] = 56

3 + 5 x ( 2 x a - 1 ) = 56 :2  = 28

5 x ( 2 x a -1 ) =28 - 3 = 25

2 x a -1 = 25 : 5 = 5

2 x a = 5 + 1 = 6

a = 6:2

a = 3

j )  3 +7 x [ 45 - 3 x ( 4 x a + 3)] = 3

7 x [ 45 - 3 x ( 4 x a + 3 )] = 3 - 3 = 0

45 - 3 x ( 4 x a +3) = 0 x 7 = 0

3 x ( 4 x a + 3 ) = 0 +45 = 45

4 x a + 3 = 45 : 3 = 15

4 x a = 15 - 3

4 x a = 12

a = 12 : 4

a = 3

sper ca e bine ;