Giải thích các bước giải:
$\dfrac{46-x}{167}+\dfrac{135-3x}{504}-\dfrac{381+3x}{510}+\dfrac{88-2x}{338}+5=0$
$\to \dfrac{46-x}{167}+\dfrac{45-x}{168}-\dfrac{127+x}{170}+\dfrac{44-x}{169}+5=0$
$\to (\dfrac{46-x}{167}+1)+(\dfrac{45-x}{168}+1)-(\dfrac{127+x}{170}-2)+(\dfrac{44-x}{169}+1)=0$
$\to \dfrac{213-x}{167}+\dfrac{213-x}{168}-\dfrac{x-213}{170}+\dfrac{213-x}{169}=0$
$\to (213-x)(\dfrac{1}{167}+\dfrac{1}{168}-\dfrac{1}{170}+\dfrac{1}{169})=0$
$\to x=213$
