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OpenStudy (anonymous):
Perimeter=70in. The sides are 21, 20 and x What is x?
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OpenStudy (anonymous):
perimeter of what?
OpenStudy (anonymous):
A triangle
OpenStudy (anonymous):
70-21-20=29
OpenStudy (anonymous):
ooh ok \[20+21+x=70\\ 41+x=70\] solve for \(x\) in one step
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