SOLUTION: Please help me with the following question: (3 + x) / 7 = (3 + x) / 12 Thank you!

Question 823234: Please help me with the following question:
(3 + x) / 7 = (3 + x) / 12
Thank you!
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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(3 + x)/7 = (3 + x)/12
12(3 + x) = 7(3 + x)
36 + 12x = 21 + 7x
5x = -15
x = -3
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