Question

Va rog frumos ajutati-ma cu exercitiile 12,13,14 <3 ❤️ dau coroana!

Answer 1

12.
a) x/3=5/1 => x=15

b) 0,(3)=3/9=1/3
0,(2)=2/9
=>1/3x=18/2
=>1/3x=9 =>27x=1 => x=1/27

c) 0,5=1/2
=>2x=1/6=>x=1/12

d) 1/8=3/2x
=>24=2x => x=12

13. a/b=2/7 => 2b=7a
a-b=50 /x2
=>2a-2b=100
=>2a-7a=100
=>-5a=100
=>a=-20

14. Nu înțeleg cerința