The value of x=10.5 units
Step-by-step explanation:
Here you should have in mind that in a parallelogram, opposite sides are congruent. In this case, AB=DC
Given the expressions, AB= 5x+7 and CD=7x-14 then you can equate the two for the value of x
5x+7 = 7x-14
collect like terms
7+14=7x-5x
21=2x
21/2=2x/2
10.5 =x
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Properties of a parallelogram : https://brainly.com/question/3100335
Keywords : parallelogram, side, value
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