y = – 2x + 1 2x – 2y = 4 Solve systems of equations by substitutions

Question

y = – 2x + 1
2x – 2y = 4
Solve systems of equations by substitutions

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Dulcie 3 years 2021-07-22T15:23:47+00:00 1 Answers 9 views 0

Answers ( )

  1. thienthi
    0
    2021-07-22T15:24:55+00:00
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    Answer:

    x= 1

    y= -1

    Step-by-step explanation:

    y=-2x+1

    2x-2y=4

    substitute for y

    2x-2(-2x+1)=4

    reduce

    2x+4x-2=4

    6x=6

    x=1

    y= -2(1)+1

    y= -1

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )