If 2 7 20 x 110 235,
Then, 7 x + 7√x = ?
2 × 2 + 3, 7 × 2 + 6, 20 × 2 + 9, 49 × 2 + 12, 110 × 2 + 15, 235 Hence, x= 49 Hence, 7 x + 7√x = 7 × 49 + 7√49 = 343 + 7 × 7 = 343 + 49 = 392
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