Can you show the steps of the answers too?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

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?

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250