Răspuns :
a+b=215
a:b=13,5
a=13b+5
13b+5+b = 215
14b=210
b=15
a+15 = 215
a=215-15
a=200
a:b=13,5
a=13b+5
13b+5+b = 215
14b=210
b=15
a+15 = 215
a=215-15
a=200
[tex]\displaystyle a+b=215 \\ a:b=13 \ rest \ 5 \to \boxed{a=13b+5} \\ \\ 13b+5+b=215 \\ 14b+5=215 \\ 14b=215-5 \\ 14b=210 \\ b=210:14 \\ \bold{b=15} \\ \\ a=13\cdot15+5 \\ a=195+5\\ \bold{a=200}[/tex]