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OpenStudy (anonymous):
y varies directly with x. When y = 20, x = 50. Find x when y = 36.
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OpenStudy (ivettef365):
you need to use formula y = kx, find k, substitute y with 20 and x with 50
OpenStudy (ivettef365):
y=kx 20=k(50) 20/50=k 2/5=k k=2/5 y=2x/5 36=2x/5 5/2 * 36=x 5* 18=x 90=x
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