Răspuns:
3. 2x + 1 = 1003
2x = 1002
x = 501
V : 2*501 + 1 =
= 1002 + 1 = 1003 :D
30(y-430) = 210 |:30
y - 430 = 7
y = 437
V : 30(437-430) =
= 30*7 =
= 210 :D
(777 - z) - 125 = 3130
z = 777 - 125 - 3130
z = -2478
V : 777 - (-2478) - 125 =
= 777 + 2478 - 125 =
= 3130 :D
