Răspunsuri

2014-08-17T22:09:12+03:00
A) x/2=y/3=z/4=t/5=k

x=2k
y=3k
z=4k
t=5k

4y+2t=132

4*3k +2*5k =132

12k +10k=132

22k=132

k=6

x=2*6=12
y=3*6=18
z=4*6=24
t=5*6=30

b) p% din 30=12

p/100 *30=12

p/10 *3=12

p/10=12/3

p/10=4

p=40%
6 4 6