Question

If $4x+5y=23$ passes through the point $(2,a)$, the value of $a$ is __________

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Answer 1

If $4x+5y=23$ passes through the point $(2,a)$, the point will satisfy the equation

$4\left(2\right)+5a=23$

$5a=23-8$

$a=\frac{15}{5}$

$a=3$