Question

Va rog sa ma ajutati!La exercitiile 22 si 23.

Answer 1

22. a) 8/5-x=7/5-2/5

8/5-x=5/5

x=8/5-5/5

x=3/5

b) 12/3-(x+3/3)=8/3

x+3/3=12/3-8/3

x+3/3=4/3

x=4/3-3/3

x=1/3

c) 2/5+[2/5+(2/5-x)]=3/5+1/5

2/5+[2/5+(2/5-x)]=4/5

2/5+(2/5-x)=4/5-2/5

2/5+(2/5-x)=2/5

2/5-x=2/5-2/5

x=2/5

23 a) 2/10+3/10+...+10/10=54/10

-1/10-2/10-....-9/10= -45/10

54/10-45/10= 9/10

b) 2/6+2/8+2/10-2/6-2/8-2/10=0