Răspunsuri

2014-08-04T11:32:52+03:00
F+b=35

b=25% din f=  25/100 *f= 1/4 *f=  f/4

f/4 +f=35  aducem la acelasi numitor

f+4f=4*35

5f=4*35

f=4*35/5

f=4*7

f=28

b=35-28

b=7