Question

am nevoie de ajutorrrr va rog!​

Answer 1

In aceste 2 poze ai rezolvările.Spor la teme!

#rere

Answer 2

Răspuns:

R:a)2020;b)12

Explicație pas cu pas:

a)5×[326-16×(54:9)]+870=

5×(326-16×6)+870=

5×(326-96)+870=

5×230+870=1150+870=2020

b)3+3×[3+3×(3+3×3)]=(3×a+3)×3+3

3+3×[3+3×(3+9)]=(3×a+3)×3+3

3+3×(3+3×12)=(3×a+3)×3+3

3+3×(3+36)=3×3×a+3×3+3

3+3×39=9a+9+3

3+117=9a+12

120=9a+12

9a=120-12

9a=108 /:9

a=12