Set the expressions equal to each other because the angles are congruent.
2x+25 = 3x-10
35 = x
Now plug the x (35) into either of the expressions.
2(35)+25 = 75+25 = 100°
X= 100°
Y = 80°
**Y is 80° because A straight line measures 180° and if one part measures 100°, then the other part has to measure 80° for the angle measure 180° total.
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