Math

The slope of a line is -2 and the line contains the points (7,4) and (x,12). What is the value of x?

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asked by Red
  1. since the slope is -2, y decreases by 2 when x increases by 1.

    since y increased by 8, x decreased by 4, so (3,12) is the other point.

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    posted by Steve

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