Answer:
x = 12°
Step-by-step explanation:
The sum of angles in a triangle is 180°.
So,
39° + 53° + 4° + 7x = 180°
Add all the numbers on the left up.
96° + 7x = 180°
Subtract 96 from both sides.
7x = 84°
x = 12°
Hope this helps!
Answer: x= 12
Step-by-step explanation:
Triangle angle sum theorem says that the interior angles of a triangle sum to 180 degrees. Set the sum of all of these angles equal to 180 to solve. 39+53+ (4+7x) = 180. Combine like terms. 96 +7x = 180. Subtract 96 from both sides. 7x = 84. Divide both sides by 7. X = 12
