Răspuns :
A+b=287
a=b/4 +12
b/4+12+b=287
b+4b=275*4
5b=1100
b=220
a=287-220=67
a=b/4 +12
b/4+12+b=287
b+4b=275*4
5b=1100
b=220
a=287-220=67
a+b=287⇒a+4a-48=287⇒5a=287+48⇒5a=335⇒a=67
a-12=b:4⇒b=4(a-12)⇒b=4*(67-12)⇒b=4*55⇒b=220
a-12=b:4⇒b=4(a-12)⇒b=4*(67-12)⇒b=4*55⇒b=220