Răspuns :
[tex]\it \left.\begin{aligned}a\ |\rule{30}{0.5}|\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \\ b\ |\rule{30}{0.5}|\rule{30}{0.5}|\rule{30}{0.5}|\end{aligned}\right\}\ 76\\ \\ \\ a=76:4=19\\ \\ b=3\cdot19=57[/tex]
[tex]\it \left.\begin{aligned}a\ |\rule{30}{0.5}|\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \\ b\ |\rule{30}{0.5}|\rule{30}{0.5}|\rule{30}{0.5}|\end{aligned}\right\}\ 76\\ \\ \\ a=76:4=19\\ \\ b=3\cdot19=57[/tex]