Question

Va rog sa mă ajutați la ex 21! Dau 50 de puncte și coroana!!!!​

Answer 1

Răspuns:

a/b=13/4=>a=13b/4

a-b=27

13b/4-⁴⁾b=⁴⁾27

13b-4b=108

b=108:9=>b=12

a=27-12=>a=15

____________

a+b=34

13b/4+⁴⁾b=⁴⁾34

13b+4b=136

b=136:17=>b=8

a=34-8=>a=26

_____________

5a+2b=365

65b/4+⁴⁾2b=⁴⁾365

65b+8b=1460

b=1460:73=>b=20

a=365-20=>a=345

Answer 2

4a=13b

a) a- b = 27 / 4

4a- 4b= 108

13b-4b=108

9b=108

b=12 => a= 39

b) a +b =34 /4

4a + 4b = 136

17b=136

b=8=>b=26

c)5a+2b=365

a=13b/:4

5(13b/4)+2b=365

65b/4 +2b=365

65b+8b=1460

73b=1460

b=20=>a= 69