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19 September, 14:51

D/3+10=7

will make brainiest to the first two people that answer correctly with explanation

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Answers (2)
  1. 19 September, 14:54
    0
    D = - 1

    Step-by-step explanation:

    D/3 + 10 = 7

    D/3 = 7 - 10 / -10

    D/3 = - 3

    D = - 3*3 / * 3

    D = - 9
  2. 19 September, 14:56
    0
    D = - 9

    Step-by-step explanation:

    Solve for D:

    D/3 + 10 = 7

    Hint: | Put the fractions in D/3 + 10 over a common denominator.

    Put each term in D/3 + 10 over the common denominator 3: D/3 + 10 = D/3 + 30/3:

    D/3 + 30/3 = 7

    Hint: | Combine D/3 + 30/3 into a single fraction.

    D/3 + 30/3 = (D + 30) / 3:

    (D + 30) / 3 = 7

    Hint: | Multiply both sides by a constant to simplify the equation.

    Multiply both sides of (D + 30) / 3 = 7 by 3:

    (3 (D + 30)) / 3 = 3*7

    Hint: | Cancel common terms in the numerator and denominator of (3 (D + 30)) / 3.

    (3 (D + 30)) / 3 = 3/3 * (D + 30) = D + 30:

    D + 30 = 3*7

    Hint: | Multiply 3 and 7 together.

    3*7 = 21:

    D + 30 = 21

    Hint: | Isolate terms with D to the left hand side.

    Subtract 30 from both sides:

    D + (30 - 30) = 21 - 30

    Hint: | Look for the difference of two identical terms.

    30 - 30 = 0:

    D = 21 - 30

    Hint: | Evaluate 21 - 30.

    21 - 30 = - 9:

    Answer: D = - 9
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