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The sum of twice a number and 4 is 80, find the number. |
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Answer» Let the number be x. Twice the number = 2x Sum of twice a number and 4 = 80 2x + 4 = 80 ⇒ 2x + 4 – 4 = 80 – 4(Subtract 4 on both sides) ⇒ 2x = 76 ⇒ 2x/2 = 76/2 (Divide by 2 on both sides) ⇒ x = 38 ∴ Number = 38 |
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