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12 January, 19:24

Which of these shows the result of using the first equation to substitute for y in the second equation, then combining like terms? y = 3x 3x + 2y = 18

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  1. 12 January, 19:55
    0
    This problem calls for a simple substitution. We need to substitute 3x in for y in the equation 3x + 2y = 18 and then simplify by combining like terms.

    3x + 2y = 18

    y = 3x

    3x + 2 (3x) = 18

    3x + 6x = 18

    9x = 18

    Now, if you want to solve for x, just divide both sides by 9 and simplify:

    9x / 9 = 18 / 9

    x = 2
  2. 12 January, 23:12
    0
    It is 9x=18 for APX
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