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If 6 × (5/7) + (2/3) – 4 = x, then find the value of x.1. 20/212. 21/203. 40/214. 20/7 |
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Answer» Correct Answer - Option 1 : 20/21 Given: 6 × (5/7) + (2/3) – 4 = x Concept: Least Common Multiple (LCM) = The L.C.M. of two or more numbers is the least number which is exactly divisible by each of them. 6 × (5/7) + (2/3) – 4 ⇒ (30/7) + (2/3) - 4 L.C.M. of (7, 3) = 21 ⇒ [(21 ÷ 7) × 30 + (21 ÷ 3) × 2 – 4 × 21]/21 ⇒ [3 × 30 + 7 × 2 – 84]/21 ⇒ [90 + 14 – 84]/21 ⇒ 20/21 ∴ The value of x is 20/21. |
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