If 2xy = 36, given the value of x is found from the equation : 9x = 54, what is the value of y ?

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Solution

The correct option is A 3
From 9x = 54, divide both sides by 9, we get x = 6
Substitute value of x = 6 in equation 2xy = 36 , i.e. $2 \times 6 \times y = 36$
$\Rightarrow 12 y = 36$
Now divide both sides by 12, we get y = 3
$∴$ solution is A

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