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Required number = x =`(17-x)/(21-x)=1/2` ⇒ 34 - 2x = 21 - x ⇒ 2x - x = 34 - 21 ⇒ x = 13
A man must travel 600 km in 12 hours. If he traveled the first 40% of the journey at a constant speed of 80 km/h, at what speed must he travel the remai...
49.96% of 120.21 + √(15) ÷ 1.87 × 4.41 = ?
179.89 + 17.04² + ?³ = √783.97 * 29.09
126.003 × 11.987 + 23.04 × 12.96 = ?
54.97% of 620.08 + 16.13 × 11.11 – 829.91 ÷ 5 = ?
( 18.02% of 699.95 ) × 16.98 = ? 2 + 22.99 × 5000 ÷ 1250
?2 - 12.5% of 647.99 = 24.98% × 363.97 + 5% of 1059.98
? 3 + 95.06 X 39.87 ÷ 5.03 = 1271.89