algebra

how do you substitute these system of equations

1.y=-3x-3
y=3x-3

2.y=4x-6
y=x

thank you!

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  1. 1. take the value of y from the first, and plug it into the second.
    (-3x-3) = 3x-3
    0 = 6x
    x = 0
    y = -3

    2. do it the other way, since the second is so simple.
    x = 4x-6
    3x = 6
    x=2
    y=2

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  2. 1.y=-3x-3
    y=3x-3
    try
    -3 x - 3 = 3 x - 3
    0 = 6 x
    x = 0
    then y = -3
    =======================
    2.y=4x-6
    y=x
    try
    x = 4 x - 6
    3 x = 6
    x = 2
    then
    y = 2

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    2. 👎 0

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