Question

Va rog rezovati-mi urmatorul exercitiu din poza!!

Exercitiul 2 atat!!!

Answer 1

→  introduc intregii in fractie

3intregi si 1 / 3 = ( 3 x 3 + 1 ) / 3 = 10 / 3

( x / 3 - 3 ) ·  5 + (3 / 10) · ( 10 / 3 )   ·  10 = 30

( x / 3 - 3 ) · 5 + 1 · 10 = 30

( x / 3  - 3 ) · 5 = 30 - 10

x / 3 - 3 = 20 : 5

x / 3 - 3 = 4

x / 3 = 4 + 3

x / 3 = 7

x = 3 · 7

x = 21

Verific:

( 21 / 3 - 3 ) · 5 + ( 30 / 30 )  ·  10 = 30

= ( 7 - 3 ) · 5 + 10 =

= 4 · 5 + 10 =

= 20 + 10 =

= 30