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12 April, 06:33

Solve the system.

3x+2y=-2 6x-Y=-6

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  1. 12 April, 07:47
    0
    So we assume that x=x and y=y is true for both situations so

    3x+2y=-2

    6x-y=6

    6x-y=6

    add y to both sides

    6x=6+y

    subtract 6 from both sides

    6x-6=y

    subsitute (6x-6) for y in first equation

    3x+2 (6x-6) = - 2

    distribute

    3x+12x-12=-2

    add like terms

    15x-12=-2

    add 12 to both sides

    15x=10

    divide both sides by 15

    x=2/3

    subsitute

    3x+2y=-2

    3 (2/3) + 2y=-2

    6/3+2y=-2

    2+2y=-2

    subtract 2 from both sides

    2y=-4

    divide both sides by 2

    y=-2

    x=2/3

    y=-2

    solution in (x, y) form

    (2/3,-2)
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