Which is > < or =, 2/3 or 6/10

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?

Is it greater than or less than7*3_9*2

Which rule describes the composition of transformations that maps △abc to △a”b”c