The point of intersection of $x + 5 y = 48 3 x + y = 18$

(3, 9)

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(4, 9)

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(4, 3)

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(9, 3)

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Solution

The correct option is C $(3, 9)$
$x + 5 y = 48 x = 48 - 5 y 3 x + y = 18 3 (48 - 5 y) + y = 18 144 - 14 y = 18 7 y = 72 - 9 y = 9 ⟹ x = 3$

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