Angle-A and angle-B are alternate interior angles with parallel lines cut by a transversal. That tells you that the two angles are EQUAL. So you can write
8x + 78 = 2x + 114 ,
and it should all be smooth sailing for you from that point.
Sixty-three, 60 + 3, 9 x 7, 63
It takes 20 miles per hour to travel 300 miles
