Given: 1 and 5 are alternate interior angles,
m21 = 5x - 11 and m2 5 = 3x + 7.
![Given 1 And 5 Are Alternate Interior Anglesm21 5x 11 And M2 5 3x 7 class=](https://ph-static.z-dn.net/files/df4/60bf4fa85a0e944c70ebbe587e90f927.jpg)
∠1 and ∠5 are alternate interior angles.
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