Răspunsuri

Cel mai inteligent răspuns!
2014-06-17T22:45:02+03:00
(a+200)-90=120

(a+200)=120+90

a+200=210

a=210-200
a=10
2014-06-17T22:48:59+03:00
(a + 200) - 180/2 = 120  ⇔
⇔ (a + 200) - 90 = 120  ⇔
⇔ a + 200 = 120 + 90 ⇔
⇔ a + 200 = 210
⇒ a = 210 - 200 = 10

1 5 1