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Please help me out !!!!!!!!!

Please help me out !!!!!!!!!-example-1

1 Answer

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If lines L and M are parallel, then the two marked angles are alternate interior angles, which are equal.
So, for them to be parallel, 7x-7=4x+14.
Solve by solving for x.
7x-7=4x+14 so
3x=21 so
X=7
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