Salma bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $200 more than the desktop. She paid for the computers using two different financing plans. For the desktop the interest rate was %5 per year, and for the laptop it was 7% per year. The total finance charges for one year were $350 . How much did each computer cost before finance charges?

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

they would have to work 32 hours.