What is the equation of a line with a slope of –2 that passes through the point (6, 8)?

Use point-slope form with slope −2 and point (6, 8): y − 8 = −2(x − 6). Simplifying gives y = −2x + 20, or 2x + y = 20. Therefore, the correct choice is A, 2x + y = 20.

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