If the point (3, 5) lies on the graph of the equation 3y = ax + 9, then the value of a is _______

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Solution

The correct option is A 2
A point lies on a line if its coordinates satisfy the equation of the line.
Putting x = 3, y = 5 in the given equation,
$3 \times 5 = a \times 3 + 9$
$\Rightarrow$ 3a + 9 = 15
$\Rightarrow$ a = 2

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