HELP ME
Lines AB and CD are parallel. If 3 measures (3x + 12)°, and 1 measures 129°, what is the value of x?
AAAaannndd the bot gets it wrong yet again!
if angles 1 and 3 are vertical angles, or alternate angles, then they are congruent, so
3x+12 = 129
3x = 117
x = 39