Answer:
x = 10
Step-by-step explanation:
By interior angle sum property of a triangle:
65° + 35° + (7x + 10)° = 180°
100° + (7x + 10)° = 180°
(7x + 10)° = 180° - 100°
(7x + 10)° = 80°
7x + 10 = 80
7x = 80 - 10
7x = 70
x = 70/7
