SOLUTION: I am resubmitting this problem once again, I entered it incorrectly the second time. The problem reads: A picture frame measures 12cm by 20cm and 128cm^2 of the picture shows.

Question 462023: I am resubmitting this problem once again, I entered it incorrectly the second time. The problem reads:
A picture frame measures 12cm by 20cm and 128cm^2 of the picture shows. Find the width of the frame
Thanks, again
Answer by JimboP1977(311) (Show Source): You can put this solution on YOUR website!
Assuming the width of the frame is the same all the way round:
(20-x)(12-x) = 128
240-12x-20x+x^2 = 128
x^2 -32x+240 = 128
x^2-32x+112 = 0
x-16)^2 - 144 = 0
x = sqrt 144 + 16
x = (-12) + 16 (can't be +12 as the dimensions are only 20cm by 12cm)
x= 4

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