[tex] \frac{1}{3} (1632 + x) = 726[/tex]
[tex] \frac{1}{3} (x + 1632) = 726[/tex]
[tex] \frac{1(x + 1632)}{3} = 726[/tex]
[tex] \frac{x + 1632}{3} = 726[/tex]
[tex]3· \frac{x + 1632}{3} = 3·726[/tex]
[tex]x + 1632 = 3·726[/tex]
[tex]x + 1632 = 2178[/tex]
[tex]x + 1632 - 1632 = 2178 - 1632[/tex]
[tex]x =546[/tex]
So, the value of x is 546.