Answer:
2+2 is 4 minus 1 is 3.
Step-by-step explanation:
Think about the question, you can't say that i am wrong.
Move all the terms involving the sine to one side, and all the numbers to the other:

3x + 11.63 = 20
3x + 11.63 - 11.63 = 20 - 11.63
3x = 8.37
by subtracting the 11.63 from both sides, this tells us how much the grapes cost....not per lb., but for the total of all the grapes.