Read method 2 of the article to understand how to do it:
https://www.wikihow.com/Balance-Chemical-Equations
the answer would be B ( 4,-5) because when I put them on a graph it came up with the right one
11/12 of a minute is 55 seconds
When the numbers are either too big, or you just want a close product. Such as 1370 and 1547. Round to the nearest number then add to the other.