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    Slope of a line

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    If the lines ax-y=6 and 4x+(a+4)y=-6 are parallel, what is a=?

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    https://brainmass.com/math/basic-algebra/slope-parallel-line-1870

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    If these lines are parallel, their slopes should be equal. And slope is calculated by dividing the ...

    Solution Summary

    This showsh ow to choose a variable to make lines parallel.

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