[tex]7. \\ d \div 5 = 231 + 2 \\ d = 231 \times 5 + 2 \\ d = 1155 + 2 \\ d = 1157[/tex]
[tex]8. \\ 299 \div x = 3 + 2 \\ x = (299 - 2) \div 3 = 297 \div 3 = 99[/tex]
[tex]9. \\ 625 \div x = 25 \\ x = 625 \div 25 = 25[/tex]
[tex]10. \\ d \div 40 = 40 \div 2 \\ d \div 40 = 20 \\ d = 20 \times 40 = 800[/tex]
