Solve 3(5x-1) = 5 (5x +1) + 40
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Consider, (5x –1) (x + 3) – (x – 5) (5x + 1) = 40 ⇒ [5x2 +14x – 3] – [5x2 – 24x – 5] = 40 ⇒ 5x2 +14x – 3 – 5x2 + 24x + 5 – 40 = 0 ⇒ 38x – 38 = 0 ⇒ 38x = 38 ∴ x = 1
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