Answer:
1.a minus five minus twelve
2.Positive twenty five minus fifty eight
3.Six a plus 9 is equal to thirty
4.Four x plus fifteen minus eighty
5.Ten h minus 9 is equal to sixty nine
Robin has to go shopping for her brother's birthday.
She already bought "x" presents for him.
The next day, Robin bought "2" more presents for him just in time for his birthday.
When she got home and celebrated his birthday, her beother opened, in total, "9" presents.
--- What is the number of presents that Robin had originally purchased? ---