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https://www.khanacademy.org/math/algebra/systems-of-linear-equations/systems-of-linear-equations-wor...
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The answer is 1,4 therefore y = 1x - 4
A = w(2w + 3)
90 = 2w^2 + 3w
2w^2 +3w - 90 = 0
(w-6)(2w+15) = 0 (TRINOMIAL FACTORING)
w = 6 inch ( it can't be -15/2 because lengths can't be negative)
l = 2w + 3
= 15 inch