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29 May, 18:23

If you were solving by substitution, for which variable in the first equation would it be easiest to solve? 3x + y = 7 x - y = 1

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  1. 29 May, 20:02
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    3x+y=1

    7x-y=1⇒ y=7x-1

    3x + (7x-1) = 1

    10x-1=1

    10x=1+1

    10x=2

    x=2/10

    x=0,2

    3x+y=1

    3*0,2+y=1

    0,6+y=1

    y=1-0,6

    y=0,4
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