Question

Afla nr necunoscut din expresiile:(d×4+20):4=12;36-42÷e:(15÷3-4-1)-20=10;22-5×(38-4×g)=12

Answer 1

Răspuns

Explicație pas cu pas:

(d × 4 + 20 ) : 4 = 12

d × 4 + 20 = 12 × 4

d × 4 + 20 = 48

d × 4 = 48 - 20

d × 4 = 28

d = 28 : 4

d = 7

_________

36 - 42 : e : ( 15 : 3 - 4 - 1 ) - 20 = 10

36 - 42 : e : ( 5 - 4 - 1 ) = 10 + 20

36 - 42 : e : ( 1 - 1 ) = 30

42 : e : 0= 36 - 30

→ Exercitiu gresit ! NU exista impartire la 0 ! Impartirea la 0 NU ARE SENS !

_____________________________________________________

22 - 5 × ( 38 - 4 × g ) = 12

5 × ( 38 - 4 × g ) = 22 - 12

5 × ( 38 - 4 × g ) = 10

38 - 4 × g = 10 : 5

38 - 4 × g = 2

4 × g = 38 - 2

4 × g = 36

g = 36 : 4

g = 9