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Q)

If $\bigstar + \bigstar + \bigstar + \bigstar = 43.56$ and $\blacktriangledown + \bigstar + \bigstar = 23.68$ then $\bigstar - 3 \times \blacktriangledown = ?$

(A) 7.09 (B) 5.29 (C) 5.19 (D) 6.49

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A)
$\bigstar + \bigstar + \bigstar + \bigstar = 43.56 \rightarrow 4 \times \bigstar = 43.56$
$\Rightarrow \bigstar = \large\frac{43.56}{4}$$ = 10.89$
$\blacktriangledown + \bigstar + \bigstar = 23.68 \rightarrow \blacktriangledown + 10.89 + 10.89 = 23.68$
$\Rightarrow \blacktriangledown = 23.68 - 10.89 - 10.89 = 1.19$
Therefore, $\bigstar - 3 \times \blacktriangledown = 10.89 - 3 \times 1.19 = 5.19$
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