Homework Help: math

Posted by Tyler on Tuesday, January 1, 2013 at 8:10pm.

Madison spent 5/8 of her savings on a microwave oven & a refrigerator. She used 4/7 of the amount she spent to buy the refrigerator. The refrigerator cost $280 more than the microwave oven. How much savings did Madison start with?

math - Reiny, Tuesday, January 1, 2013 at 8:43pm
let the amount of her savings be x

cost of both = (5/8)x
cost of fridge = (4/7)(5/8)x = (5/14)x

(5/8)x - (5/14)x = 280
15x/56 = 280
15x = 15680
x = 1045.33

Here savings were $1053.33

cost of fridge = ((5/14)(1045.33 = 373.33
cost of both = (5/8)(1045.33) = 653.33
difference = 653.33 - 373.33 = 280
all checks out

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