4х/3в-21 + 3в/14-2в

To simplify the expression 4х/3в - 21 + 3в/14 - 2в, we first need to find a common denominator. The common denominator in this case is 14-2в.

So the expression becomes: (4х(14-2в) - 21(14-2в) + 3в(3в))/(3в(14-2в))

Next, we simplify each term: 4х(14-2в) = 56х - 8хв 21(14-2в) = 294 - 42в 3в(3в) = 9в^2

Putting it all together, the expression simplifies to: (56х - 8хв + 294 - 42в + 9в^2)/(3в(14-2в))

Now, if there are any like terms that can be combined, you can simplify further by simplifying each term. If not, the expression is already simplified.