(x + 1) + ( x + 2) + ............+ (x + 50) = 1375
(x * 50) + (1 + 2 + ............+ 50) = 1375
x * 50 + 1275 = 1375
x * 50 = 1375 - 1275
x * 50 = 100
x = 100 : 50
x = 2
Chúc bạn hok tốt nha!
=> x . 50 + ( 1 + 2 + 3 + ...+ 50 ) = 1375
=> x . 50 + 1275 = 1375
=> x . 50 = 100
=> x = 2