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2x - 1 + 2x + 1 = 320. Find the value of x.1. 62. 73. 84. 9 |
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Answer» Correct Answer - Option 2 : 7 Given: 2x - 1 + 2x + 1 = 320. We have to find the value of x. Calculation: 2x - 1 + 2x + 1 = 320 ⇒ 2x/2 + 2x × 2 = 320 ⇒ 2x(1/2 + 2) = 320 ⇒ 2x × (5/2) = 320 ⇒ 2x = 320 × (2/5) ⇒ 2x = 64 × 2 ⇒ 2x = 128 ⇒ 2x = 27 ⇒ x = 7 ∴ The required value of x is 7. |
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