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Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer. 

If a, b, and c are numbers such that a over b = 3 and b over c = 7, then (a+b) over (b+c) is equal to which of the following?

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Apply the following properties of proportions a over b = c over d is equivalent with (a + b) over b = (c + d) over d and a over (a+b) = c over (c+d).

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