500
Larry and his sister, Betty, are saving money to buy their own laptop computers. Larry has
$215 and can save $35 each week. Betty has $380 and can save $20 each week. The time
Larry and Betty have the same amount of money.
What is Let x = weeks, y = total money saved. Larry: y = 35x + 215 ; Betty: y = 20x + 380 .
The solution is (11, 600). They will both have $600 in 11 weeks.