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24 June, 11:05

Three times a number plus 12 minus 5 times the same number is 22

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  1. 24 June, 11:25
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    Three times (3 ·) a number (x) plus (+) 12 minus (-) 5 times (·) the same number (x) is (=) 22

    3x + 12 - 5x = 22 Combine like terms (3x and - 5x)

    -2x + 12 = 22 Subtract 12 from both sides

    -2x = 10 Divide both sides by - 2

    x = - 5
  2. 24 June, 11:31
    0
    1. a number is represented by "x"

    3x + 12 - 5x = 22

    12 - 2x = 22

    -2x = 10

    x = - 5

    2. (45) + (45) + (45 + 6x) = 303

    job 1, 2, 3 equals total for the day

    135 + 6x = 303

    6x = 168

    x = 28

    the plumbers hourly rate is $28/hr
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