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OpenStudy (anonymous):
Sam can not read a 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?
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OpenStudy (anonymous):
A. -4 B. 2 C. 4 D. 10
OpenStudy (anonymous):
Thanks for the answers
OpenStudy (anonymous):
What does it equal to
OpenStudy (anonymous):
I don't know. -.-
jimthompson5910 (jim_thompson5910):
-7y + 5(3 + __ y) -7y + 5(3 + n*y) -7y + 15 + 5ny (-7y + 5ny) + 15 (-7+5n)y + 15 This expression is equal to 3y + 15, so (-7+5n)y + 15 = 3y + 15 (-7+5n)y = 3y -7 + 5n = 3 keep going to solve for n
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