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X varies directly as y, and x = 153 when y = 9. Find x when y = 13.
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X varies directly as y, and x = 153 when y = 9. Find x when y = 13.

User Lucas Serafim
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x = 153 = 17* 9, so when y = 13, x= 21*13= 273

x= 17 18 19 20 21
y= 9 10 11 12 13
User Paul Gregory
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