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13 September, 05:13

To solve an equation using substitution - the equations are y=6x-11

-2x-3y = - 7

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Answers (1)
  1. 13 September, 05:31
    0
    So we see we got y=6x-11

    sub 6x-11 for y int other eqution

    -2x-3 (6x-11) = - 7

    expand/distribute

    -2x-18x+33=-7

    -20x+33=-7

    minus 33 both sides

    -20x=-40

    divide both sides by - 20

    x=2

    sub back

    y=6x-11

    y=6 (2) - 11

    y=12-11

    y=1

    x=2

    y=1

    (x, y)

    (2,1)
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