Question

Exercitiul 4 urgent.Dau coroana.....

Answer 1

a) la primul:10/7.
la al doilea: 16/8
la al treilea: 3/6
b) la primul: x=4/9
la al doilea: x= 2/12
la al treilea: 0/5

Answer 2

a.
2/7+1/7+3/7+4/7=10/7

1/8+1+3/8+4/8=1/8+8/8+3/8+4/8=16/8

1-(2/6+4/6-3/6)=6/6-(6/6-3/6)=6/6-3/6=3/6

b.
x+3/9=6/9-1/9
x+3/9=5/9
x=5/9-3/9
x=2/9

x-8/12=5/12+1
x-8/12=5/12+12/12
x-8/12=17/12
x=17/12+8/12
x=25/12

7/5-(2/5+x)=1
7/5-(2/5+x)=5/5
7/5+x=5/5+2/5
7/5+x=7/5
x=7/5-7/5
x=0/5