in april the vega family gets 400 text messages included in their plant.together,tomas and marisol use half of the messages.javier and sergio use 120 messages.carmen uses the rest of the messages.write and evaluate and expression to find the number of messages carmen uses.show your work
half of 400 (the amount of texts per month) is 200, so then you subtract 200 - 120 ( the amount of messages javier and sergio used) that equals 80 so the amount of messages carman used was 80
