What did the king of queen of spain give columbus and return

For a decade, Columbus approached the Portuguese king and the Spanish monarchs to obtain a grant to explore possible trade routes to the west. After initially turning him down, King Ferdinand and Queen Isabella reconsidered once the Moors had been successfully expelled from Spain in 1492. I don't know if this is what you are looking for but I hope it helps.

the mongolian invasion of china and central asia resulted in a disruption of the silk road as the chinese garrisons lost support from the chinese kingdoms which fell under the mongols. however, as the mongols established a formal dynasty in china, the successors of genghis khan restored the garrisons along the silk road allowing the safe travel caravans again.

1.3x - 2 - (3.3x + 5) = 2x + 1

1.3x - 2 - 3.3x - 5 = 2x + 1

-2x - 7 = 2x + 1

-7 = 4x + 1

-8 = 4x

x = -2