Tris102 Tris102

11-05-2018
Mathematics

contestada

If y varies directly as x and y=12 when x=72, find x when y=9

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YaoCheng YaoCheng

11-05-2018

You can do 12/72 = 9/x. You cross multiply and it becomes 12x = 648. Divide 648 by 12, and x equals 54.

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bluetopaz bluetopaz

11-05-2018

9 x 72 = 648

648 ÷ 12 = 54

x = 54

Hope this helps :)

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