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2 February, 13:59

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation? 2x + y = 8

-x - 3y = - 12

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  1. 2 February, 15:23
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    -x - 3y = - 12

    -x = 3y - 12 ... multiply by - 1 to make x positive

    x = - 3y + 12

    so u would sub in - 3y + 12 for x in the first equation
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