Can someone help me solve this problem?

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

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

Solve for the equation. 4x - 13 = 2x + 9