Question

Ajutooor,vă rog dau coroana.!​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

a × 3 + 3 = 30

a × 3 = 30 - 3

a × 3 = 27

a = 27 : 3       ⇒   a = 9

_____________________

b)

( b + 3 ) × 3 = 30

b + 3 = 30 : 3

b + 3 = 10

b = 10 - 3

b = 7

______________

c)

( c - 3 ) : 3 + 5 = 30

( c - 3 ) : 3 = 30 - 5

( c - 3 ) : 3 = 25

c - 3 = 25 × 3

c - 3 = 75

c = 75 + 3

c = 78

Verific:

( 78 - 3) : 3 + 5 = 75 : 3 + 5 = 25 + 5 = 30