Răspunsuri

2014-10-18T21:29:07+03:00
A=20:2=10
b=20-10=10
c=30-10=20
2a=3b=c=10x2=10x3=20=20+30+20=70
2014-10-18T21:32:53+03:00
20:2=10(a)
20-10=10(b)
30-10=20(c)
10*2+10*3+20=20+30+20=70 (2a+3b+c)