το άθροισμα δυο διαδοχικών φυσικών αριθμών είναι 55.Αν ο μικρότερος είναι χ ,ποιος είναι ο άλλος.
the sum of two consecutive natural numbers is 55. If the smaller number is x, what is the other?
If the smaller number =x, then the larger number is:
x + 1, so that:
x + [x +1] =55 subtract 1 from both sides,
2x =55 - 1
2x = 54 divide both sides by 2
x = 54/2
x =27 - which is the smaller number. And,
27 + 1 =28 - which is the larger number, so that:
27 + 28 = 55.
