Can someone help me I need to turn this in right now !

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?