Răspunsuri

  • Utilizator Brainly
2014-05-24T15:30:52+03:00
A+b=306⇒ a=306-b
a-b=b/4
306-b-b=b/4 ⇒ aducem la  acelasi numitor
1224-4b-4b=b
-8b-b=-1224
-9b=-1224
9b=1224
b=136  

a=306-b
a=170
2 1 2
  • Utilizator Brainly
2014-05-24T17:30:37+03:00
Ti-o rezolv imediat  daca vrei 

a+b=306⇒ a=306-b
a-b=b/4
306-b-b=b/4 ⇒ aducem la acelasi numitor
1224-4b-4b=b
-8b-b=-1224
-9b=-1224
9b=1224
b=136

a=306-b
a=170