SOLUTION: What is the value of x?
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Question 1064497: What is the value of x?
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Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
The smaller (upper) triangle has sides that are proportional to the larger (outermost) triangle. Let's set up a proportion:
Noting that
Let's us simplify to:
—
Check: (3(9)-20) / (3(9)-20+56) = 7/63 = 1/9 (= 9/81 = 9/(72+9), so its ok)
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