This is what said to me:

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

Will positive numbers always have a higher absolute value than negative numbers?