47.87% of 749.76 + 35.11% of 399.76 = √? + 23.15 × 20.87
ATQ, 47.87% of 749.76 + 35.11% of 399.76 = √? + 23.15 × 20.87 48% of 750 + 35% of 400 ~ √? + 23 × 21 360 + 140 – 483 ~ √? √? ~ 17 ? ~ 289
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