Rob is looking into a new cell phone plan to see if he could save money. plan a which he already has consists of a $45 fee for all cell phone calls made in a month and $.30 per text message sent. plan b which rob is looking to switch to consists of a $60 fee for all cell phone calls made in a month and $.25 per text message sent. he wants to spend a total of $150. using the variable t to represent the number of text messages sent, create two equations for plan a and plan b.