Help me on these questions!

1. The teacher's bill for €15 worth of copies and 8 English workbooks was €35. What did each workbook cost?
2. Patrick spent 30% of his money on a football and 60% of it on football boots. If Patrick had €3 left, how much money had he at the start?

1 answer

(35 - 15) / 8 = €_________ each

0.1x = €3
Solve for x.