Question

vreau si eu rezolvarile la A,B,C​

Answer 1

Explicație pas cu pas:

A. x nr initial

x*2-5=7

2*x=12

x=6

B. [(x*2-5)]*2-5)=9

4*x-10-5=9

4*x=24

x=6

C.{[(x*2-5)*2-5]*2-5}=13

[(4x-10-5)*2-5]=13

8x-20-10-5=13

8x=48

x=6