Answer:
n<22
Step-by-step explanation: That is the best i can do it
From breaking up the problems and sorting them out
20 quarts is less than 10 gallons because there are 4 quarts to a gallon which make 20 quarts 5 gallons for it to be 10 gallons it would have to be 40 quarts
Add 1.5 to both sides:

Divide both sides by 2:

Consider the arcsin of both sides:

Arcsin and sin simplify, because they are inverse of each other:

-4x + 28 = 36
28 = 36 + 4x / - 36
-8 = 4x
-2 = x