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25 September, 16:04

Variable y varies directly with variable x, and y = 4 when x = 7.

What is the value of x when y = 12?

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  1. 25 September, 16:16
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    I think it equals 21, because since y is 4 and and the total is 12, that equals 4*3, and so 7*3 equals 21
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