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Math

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Robin cross- stitches bookmarks and wall hangings . A bookmark takes her 1 1/2 days, and a wall hanging takes her 4 days. Robin recently spent 18 days cross- stitching 7 items. Solve the system of equations to find the number of bookmarks b and the number of wall hangings w that Robin cross- stitched.

1 1/2b+4w=18
b+w=7
Please help me and show your work thanks

  • Math -

    1 1/2b+4w=18
    (3/2)b + 4w = 18
    times 2
    3b + 8w = 36
    equation #2 times 3
    3b + 3w = 21
    subtract them
    5w = 15
    w = 3
    back into b+w=7
    b+3=7
    b=4

    w=3, b=4

    check::
    1.5(4) + 4(3) = 18 , yeah
    4+3=7, yeah

  • Math -

    1.5 b + 4 w = 18
    b + w = 7 so w = (7-b)

    1.5 b + 4 (7-b) = 18

    1.5 b + 28 - 4 b = 18

    10 = 2.5 b

    b = 4
    then
    w = 3

  • Math -

    helo am spodermena dice

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