Answer
Both angles measure 65.
Work Step by Step
The labeled angle form a corresponding angle pair. The corresponding angle theorem tells us they are congruent, so they have the same measure.
$3x-10=x+40\longrightarrow$ definition of congruent
$2x-10=40\longrightarrow$ subtraction property of equality
$2x=50\longrightarrow$ addition property of equality
$x=25\longrightarrow $ division property of equality
Substitute to find the angle measures.
$3x-10=3(25)-10=75-10=65$
$x+40=25+40=65$
