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Solve for x: 3x – 1= 4(5 – x).

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Question:

A
3

explanation

First distribute the 4 on the right side of the equation to obtain 3x – 1 = 20 – 4x.

Then add 4x to both sides to get 7x – 1 = 20. Add 1 to both sides to get 7x = 21. Finally, divide both sides by 7 to get x = 3.

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