Question 1126184
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Let's look at the equation you show: y = 1.00x+17.<br>
The 1.00 is the cost per download at the first site; so 1.00x is the cost of downloading x tunes from that site.  Then, since the amount of money Salim would need to download all his tunes from that site is $17 more than what he has, 1.00x+17 is the amount of money he would need to download all his tunes from that site.<br>
So the equation you show is a good one for showing an expression for the amount of money Salim has.<br>
Now do the same thing for the other site.  At $0.80 per download from the other site, the amount of money he has is $5.00 MORE than what he needs.  Use those numbers to make another equation in the form y = mx+b for the amount of money he has.<br>
Then you will have two different expressions for the amount of money Salim has.  Write and solve the equation that says those two expressions are equal to each other.