Question

Problemele 5 si 6.....

Answer 1

......................................

Answer 2

5. 4/5=80/100;
6. 3·3a=5·2b⇒9a=10b;
⇒a=10b/9;
⇒5a+2b=204
⇒5·10b/9+2b=204
⇒50b/9+2b=204
⇒50b/9+18b/9=204
⇒68b/9=204
⇒68b=9·204
⇒68b=1836
⇒b=1836/68
⇒b=27;
⇒a=10b/9
⇒a=10·27/9
⇒a=10·3⇒a=30;
⇒a-b=30-27⇒3;