x=y+3 4 = 3x – 2y It’s substitution but I don’t know how to do it

Question

x=y+3
4 = 3x – 2y
It’s substitution but I don’t know how to do it

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Jezebel 4 years 2021-08-09T17:10:15+00:00 2 Answers 5 views 0

Answers ( )

    0
    2021-08-09T17:11:23+00:00

    x= -2, y= -5

    plug x=y+3 into the second equation
    4= 3(y+3) -2y

    solve for y
    4= 3y+9 -2y
    4=y+9
    y= -5

    plug y= -5 into either equation to get x
    x= -5+3
    x=-2

    0
    2021-08-09T17:12:01+00:00

    Answer:

    4= 3(y+3) – 2y (substitute the given x-value into the equation to solve for y)

    4= 3y+9-2y (use the distributive property)

    4=y+9 (combine like terms)

    y= -5 (subtract 9 from both sides to isolate the y-term)

    plug it in

    x= (-5)+3

    x=-2

    (-2,-5)

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