1.a)
x=[tex] \frac{2*15}{6}= \frac{30}{6}= 5[/tex]
b)(-3)+(-7)+12=-3-7+12=-10+12=2
2
.3 caiete.......18lei
5 caiete.......x lei
x=[tex] \frac{5*18}{3}= \frac{90}{3}=30 [/tex]
b)12 muncitori.....6 zile
8 muncitori.....x zile
x=[tex] \frac{8*6}{12}= \frac{48}{12}=4 [/tex]
3.a)
40% din 120
[tex] \frac{40}{100}*120= \frac{4800}{100}=48 [/tex]
b)
30% din elevi sunt fete
f+b=20
f=[tex] \frac{30}{100}*20= \frac{600}{100}=6 [/tex] fete
6+b=20
b=20-6
b=14
