Math question

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Please help me to solve by substitution method.

7x+8y =44

x=41-5y

  • Math question -

    7 x 41-5y+8y=44
    287+3y=44
    3y=-287+44
    3y=-243
    y=-243 divided by 3
    y=81

  • Patty is incorrect - Math question -

    Patty should have used brackets

    in 7x + 8y = 44
    7(41-5y) + 8y = 44
    287 - 35y + 8y = 44
    -27y = -243
    y = 9

    then in x= 41-5y
    x = 41-45
    x = -4

    so x=-4 and y = 9

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