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7 October, 20:17

20 = r + 11

Solve the equation.

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Answers (2)
  1. 7 October, 23:06
    0
    r=9

    Step-by-step explanation:

    Step 1: Flip the equation

    r + 11 = 20

    Step 2: Subtract 11 from both sides

    r + 11 - 11 = 20 - 11
  2. 7 October, 23:59
    0
    Answer: r = 9

    Step-by-step explanation:

    Simplifying

    20 = r + 11

    Reorder the terms:

    20 = 11 + r

    Solving

    20 = 11 + r

    Solving for variable 'r'.

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

    Add '-1r' to each side of the equation.

    20 + - 1r = 11 + r + - 1r

    Combine like terms: r + - 1r = 0

    20 + - 1r = 11 + 0

    20 + - 1r = 11

    Add '-20' to each side of the equation.

    20 + - 20 + - 1r = 11 + - 20

    Combine like terms: 20 + - 20 = 0

    0 + - 1r = 11 + - 20

    -1r = 11 + - 20

    Combine like terms: 11 + - 20 = - 9

    -1r = - 9

    Divide each side by '-1'.

    r = 9

    Simplifying

    r = 9
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