algebra 1

5) x-y=1
3x=3y=3

6) 2x-y=6
3y=-6x=18

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  1. Substitute x = y + 1
    3(y +1) + 3y = 3

    3y + 3 + 3y = 3
    6y + 3 = 3
    6y+3 -3 = 3-3

    6y = 0
    y = 0

    x = y + 1
    x = 0+ 1
    x = 1
    (1, 0)

    6) substitute y = -2x +6
    2x -1(-2x + 6) =6
    2x + 2x - 6= 6

    4x = 12

    x = 3
    y = 0
    (3,0)

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