A new gaming chair costs $239.87. You have already saved $106.37 and earn $44.50 each week babysitting. Write and solve an equation to determine how many weeks, w, you must babysit to earn enough money to buy the new gaming chair.

44.5w + 106.37 = 239.87; w = 3
44.5w − 106.37 = 239.87; w = 9
44.5w − 239.87 = 106.37; w = 9
44.5 + 106.37w = 239.87; w = 3