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27 January, 05:00

Find x

9x+3+5x-2+11x-21=180

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Answers (2)
  1. 27 January, 07:13
    0
    Answer: x = 8

    Step-by-step explanation:

    Simplify: (9x+5x+11x) + (3-2-21) = 180

    25x-20 = 180

    25x = 200

    x = 8
  2. 27 January, 08:06
    0
    x = 8

    Step-by-step explanation:

    Simplifying

    (9x + 3) + (5x + - 2) + (11x + - 21) = 180

    Reorder the terms:

    (3 + 9x) + (5x + - 2) + (11x + - 21) = 180

    Remove parenthesis around (3 + 9x)

    3 + 9x + (5x + - 2) + (11x + - 21) = 180

    Reorder the terms:

    3 + 9x + (-2 + 5x) + (11x + - 21) = 180

    Remove parenthesis around (-2 + 5x)

    3 + 9x + - 2 + 5x + (11x + - 21) = 180

    Reorder the terms:

    3 + 9x + - 2 + 5x + (-21 + 11x) = 180

    Remove parenthesis around (-21 + 11x)

    3 + 9x + - 2 + 5x + - 21 + 11x = 180

    Reorder the terms:

    3 + - 2 + - 21 + 9x + 5x + 11x = 180

    Combine like terms: 3 + - 2 = 1

    1 + - 21 + 9x + 5x + 11x = 180

    Combine like terms: 1 + - 21 = - 20

    -20 + 9x + 5x + 11x = 180

    Combine like terms: 9x + 5x = 14x

    -20 + 14x + 11x = 180

    Combine like terms: 14x + 11x = 25x

    -20 + 25x = 180

    Solving

    -20 + 25x = 180

    Solving for variable 'x'.

    Move all terms containing x to the left, all other terms to the right.

    Add '20' to each side of the equation.

    -20 + 20 + 25x = 180 + 20

    Combine like terms: - 20 + 20 = 0

    0 + 25x = 180 + 20

    25x = 180 + 20

    Combine like terms: 180 + 20 = 200

    25x = 200

    Divide each side by '25'.

    x = 8
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