Răspuns:
b) 90
Explicație pas cu pas:
I)
[tex]2 \rightarrow 2 \cdot \red { \bf4} + \purple {\bf2} = 10 \ \rightarrow 10 \cdot \red { \bf4} + \purple { \bf2} = 42[/tex]
II)
[tex]5 \rightarrow 5 \cdot \red {\bf4} + \purple {\bf2} = 22 \ \rightarrow 22 \cdot \red {\bf4} + \purple {\bf2} = 90[/tex]