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3 December, 07:21

Sam can not read part of this homework problem. - 7y + 5 (3 + ___y) Sam knows the expression simplifies to 3y + 15. What number belongs on the blank line in the homework problem?

A - 4

B 4

C 10

D 2

+2
Answers (2)
  1. 3 December, 07:27
    0
    Let the variable A represent the number that goes in the blank.

    -7y + 5 (3 + Ay) = 3y + 15

    -7y + 15 + 5Ay = 3y + 15

    -7y + 5Ay = 3y

    (-7 + 5A) y = 3y

    -7 + 5A = 3

    5A = 10

    A = 2

    Answer: D. 2
  2. 3 December, 07:44
    0
    D is the correct answer
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