Question

X + X- X = 14
- - -
2 3 4

Answer 1

$\dfrac{x}{2}~+~\dfrac{x}{3}~-~\dfrac{x}{4}~=~14\\\\\\MMC(2,3,4)~=~12\\\\\\\dfrac{6~.~x~+~4~.~x~-~3~.~x}{12}~=~14\\\\\\\dfrac{7x}{12}~=~14\\\\\\7x~=~14~.~12\\\\\\x~=~\dfrac{14~.~12}{7}\\\\\\x~=~\dfrac{2~.~12}{1}\\\\\\\boxed{x~=~24}$