hard to solve

While the inequalities of apartheid were always going to be hard to solve, and the ANC was praised for making progress in its first 10 years in government, it is now being blamed by many for failures in basic government services, numerous corruption scandals and most recently an electricity crisis that led to rolling blackouts across the country of 62 million.

Why is something so simple to state so hard to solve?

However, these equations are extremely complex and hard to solve.

Optimal routing is among the prime examples of “NP-hard” problems, the name given to tasks that are at least as hard to solve as the most complex problems from NP.

There are a lot of people who do understand the problem and are working really hard to solve it.