Răspuns :
a+b=270
a/b=9+20
a=9b+20
9b+20+b=270
10b=270-20
10b=250
b=250/10
b=25
a=9b+20=9*25+20=225+20=245
a/b=9+20
a=9b+20
9b+20+b=270
10b=270-20
10b=250
b=250/10
b=25
a=9b+20=9*25+20=225+20=245
a+b=270
a:b=9 r=20
a=9b+20
9b+20+b=270
9b+b=270-20
10b=250
b=250:10
b=25
a=9x25+20=225+20
a=245
V: 245+25=270
245:25=9 rest 20
a:b=9 r=20
a=9b+20
9b+20+b=270
9b+b=270-20
10b=250
b=250:10
b=25
a=9x25+20=225+20
a=245
V: 245+25=270
245:25=9 rest 20