Name: SAT Math Help & School Math Mastery
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#36763

angles

congruence

geometry

medium

90 sec

Triangles $X Y Z$ and $L MN$ are congruent, where $X, Y,$ and $Z$ correspond to $L, M,$ and $N,$ respectively. The measure of angle $Y$ is $(3 x - 10)^{\circ}$ and the measure of angle $M$ is $(x + 40)^{\circ}$ . What is the value of $x$ ?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.