Set up an equation based on the information given.
12x + 145 = 1345
Solve the equation to see how much she needs to save each week.
First, subtract 145 from both sides.
12x = 1200
Divide 12 off of both sides to find the value of x.
x = 100
She needs to save 100 dollars each week, for 12 weeks to buy the laptop.
