There are two computers you want to buy but each one has a different special deal. The first deal is $50 cashback with $5 more for each referral you give. The second deal is for $130 cashback with no referral bonus. How many referrals do you need to give before the first deal is better?

17 referrals. First you subtract $50 from $130 to find the difference between them. That gives us $80. So now divide $80 by 5, the amount of money you receive when you give a referral. You get 16, but the question is how many referrals do you need to give to make the first deal BETTER. So that means the first deal has to have a bigger cash back than the second deal. So 16 becomes 17, because now the first deal is better because you get $135 in cashback. Hope this is right and that it helps!