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#38424

angles

triangle

hard

90 sec

In the figure shown, lines $a$ , $b$ , and $c$ intersect to form a triangle. The measures of two interior angles of the triangle are $2 x^{\circ}$ and $(x + 10)^{\circ}$ . The measure of the exterior angle adjacent to the third interior angle is $(4 x - 20)^{\circ}$ . 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.