Angles marked with the same angle marker are congruent.
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Practice makes perfect
Looking at given figure, we can see that we have two angles marked with the same angle marker: ∠ NQM and ∠ PQR.
Since angles marked with the same angle marker are congruent, we can tell that the measures of angles ∠ NQM and ∠ PQR are equal. Equating them and substituting given expression for the measures creates an equation that we can solve for x.
