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2(3/4) of 2880 + 54% of 7520 - ? = 302 => 11/4 × 2880 + (54/100) × 7520 - ? = 900 => 7920 + 4060.8 - ? = 900 => ? = 7920 + 4060.8 – 900 => ? = 11080.8
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