solve by system of equations by substitution and show work plz and thank you y=2x+3 y=-x-9

Question

solve by system of equations by substitution and show work plz and thank you y=2x+3 y=-x-9

in progress 0
Thành Công 4 years 2021-08-31T05:02:32+00:00 1 Answers 10 views 0

Answers ( )

  1. dangkhoa
    0
    2021-08-31T05:04:12+00:00
    Reply

    Answer:

    X=-4, y=-5

    Step-by-step explanation:

    Y=2X+3

    y=-x-9

    substitute by inserting y value of 2nd equation (-x-9) into y value of 1st equation:

    -x-9=2x+3

    -x-9+9=2x+3+9

    -x=2x+12

    -3x=12

    x=-4

    solve for y by inserting x value (2) into either equation

    y=2x+3

    y=2(-4)+3

    y=-8+3

    y=-5

    check answer by inserting x and y into either equation to make sure they equal:

    y=2x+3

    -5=2(-4)+3

    -5=-8+3

    -5=-5

    or

    y=-x-9

    -5=-(-4)-9

    -5=-5

Leave an answer

Browse

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