He needs $155, and he already has 35. The 20 is how much he will get a week, and the <em>w</em> represents how many weeks will pass before he gets enough twenties for the shoes.
If he gets $20 each week, and he already has $35, then after 6 weeks he will have enough money for the shoes.
If Alana pays $125/mo toward an insurance plan that costs $565/mo then her employer must be paying the difference = 565-125 = 440/mo.For the full year of 12 months then her employer pays = 12*440 = $5280.
