What is b in the equasion? (b+3)/7 + (b-3)?

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?

The function show two sisters' savings account and the rate at which they plan to deposit money

2/3(-6y+9x) expand each expression using the distributive property