briannaponce218 briannaponce218
  • 14-08-2021
  • Mathematics
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Help!
Find the value of x for which ABCD must be a parallelogram.

Help Find the value of x for which ABCD must be a parallelogram class=

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rthomas111 rthomas111
  • 14-08-2021
3
In a parallelogram, the diagonals (the lines inside from corner to corner) bisect each other. That means the two halves of the diagonal are equal to each other.
So
-9-6x=x-30
-9-6x+6x=x-30+6x
-9=7x-30
21=7x
x=3
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