Question

If two thirds of a number, half of the same number and one seventh of the same
number is added to itself, the result is 679. Find the number.

Answer 1

Let the number be x

Therefore, 2x/3 + x/2 + x/7 = 679

(28x + 21x + 6x)/42 = 679

55x = 679×42

x= 28518/55

x= 518.509090909...

Hope it helps...