Added 1 minute ago
I know how to solve Pasha and his friends' problem, but I can't be bothered.
Added 1 minute ago
The first equation in the second picture is also easy to solve: bring it to a common denominator, set the numerator and denominator to zero, and then the interval method makes it easy to solve.
Bow down and hear our cry,
Our earthly rulers falter,
Our people drift and die,
The walls of gold entomb us,
The swords of scorn divide,
Take not thy thunder from us,
Take away our pride.
G.K. Chesterton: English Hymnal