SOLUTION: A number is substracted from 20 and from17 the product of the numbers so obtained is 180..find the original number

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Question 917028: A number is substracted from 20 and from17 the product of the numbers so obtained is 180..find the original number
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
x the number
(20-x)(17-x) = 180 ***
x^2 - 37x+ 340 - 180 = 0
x^2 - 37x+ 160 = 0
(x-32)(x-5) = 0
x = 5, 32
And...checking***
%2820-5%29%2817-5%29+=+15%2A12+=+180
%2820-32%29%2817-32%29+=+%28-12%29%28-15%29+=+180