Question 401130
Your problem is not copied properly, do you mean to say {{{12/7x}}}??? because that's how you wrote it. I'm assuming you mean {{{12x/7}}} The x on top or middle is the same thing, but it's not equivalent to the x being on the bottom. Use proper brackets so that we could see the correct problem.
{{{(7/3)(12x/7)=(12x/3)=4x}}}