Answer:
m∠1 = 71°
Step-by-step explanation:
63 + ( 15x - 3 ) = 180 degrees
63 + 15x - 3 = 180
15x = 180 - 63 + 3
15x = 120
x = 8
Enter into ( 8x + 7 )
( 8·8 + 7 ) = ( 64 + 7 ) = 71
Angle m∠1 = 71°
