The question isn't complete and you might want to ask this in the math section.
But just to help you out, 3x means 3 times whatever "x" is.
<span>The main cause was that there was an increase in the demand for silk during this time period. With the increase in trade and the heightened interest in products containing silk, it required more workshops dedicated to the production of silk and silken garments.</span>
Overfishing the gúlf of Mexico
Overgrazing by livestock is what <span> has caused kenya to experience land degradation</span>
The climate was very cold up there and the terrain tended to be rocky
