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OpenStudy (anonymous):
Find the values of c and a for which ABCD must be a parallelogram. http://media.education2020.com/EVresources/400915_517aa5bd-c71f-49d9-9abd-e8df6db0a702.png
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OpenStudy (anonymous):
Since it's a parallelogram 2a+15=4a-33 Subtract 2a on both sides 15=2a-33 Add 33 on both sides 48=2a Divide by 2 24=a For c 3c-5=2c+3 Subtract 2c on both sides c-5=3 Add 5 on both sides c=8
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