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Find the value of x for which ABCD must be a parallelogram.

Find the value of x for which ABCD must be a parallelogram.-example-1
User ILS
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4 votes
x=1
This is because 18 - 4*1 = 7*1 +7

User Marius Ilie
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3 votes
18-4x=7x+7
11-4x=7x
11=11x
x=1
User Re
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