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17 September, 09:52

Solve the system by the substitution method. x+y=9 y=2x

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  1. 17 September, 10:36
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    x=3 and y=6

    Step-by-step explanation:

    Substitute: y=2x in place of Y in the first equation we will put 2x

    x+2x = 9

    1x+2x=9

    3x=9

    divide both sides by 3

    x=3

    Now go to either of the original equations and substitute the answer you got for x which is 3 to find y

    y=2x so 2 times 3 = so y = 6
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