Explicație pas cu pas:
[tex] \huge \: x = 5y \\ \\ \huge \: x - y = 172 \\ \\ \huge5y - y = 172 \\ \\ \huge4y = 172 \\ \\ \huge \: y = 172 \div 4 \\ \\ \huge\boxed{\green{y = 43}}[/tex]
[tex] \huge \: x = 5y \\ \\ \huge x= 5 \times 43 \\ \\ \huge\boxed{ \green {x= 215}}[/tex]
