a\b=4/10 b-a=42 a,b=

Răspuns:
a/b=4/10=>a=4b/10
b-a=42
¹⁰⁾b-4b/10=¹⁰⁾42
10b-4b=420
b=420:6=>b=70
a=4×70:10=>a=280:10=>a=28