The average of x 1, x 2 and x 3 is 14. Twice the sum of x 2 and x 3 is 30. What is the value of x 1?

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Accepted Answer

x1 + x2 + x3 = 3 x 14 = 42 ....(i) and (x1 + x2) x 2 = 30 ⇒ x1 + x2 =15 ....(ii) From Eqs. (i) and (ii), we get x1 + 15 = 42 ∴ x

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