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a non toxic wood furniture polish can be made by mixing mineral (or olive) oil with vinegar. To make a 16-oz batch for a squirt bottle, Jazmun uses an amount of mineral oil that is 4 oz more than twice the amount of vinegar. How much of each ingredient is required?

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Answer:

mineral oil: 12 oz

vinegar: 4 oz

Explanation:

Assuming: x is the amount of vinegar, and y is the amount of mineral oil

mineral oil that is 4 oz more than twice the amount of vinegar ⇒ y = 4 + 2x

a squirt bottle is 16 - oz = he amount of vinegar + the amount of mineral oil

16 = x + y = x +4+2x = 3x +4

⇔ 3x = 16-4 = 12

⇔ x = 4

⇒ y = 4 + 2x = 4 + 2x4 = 12

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