Answer:
x=22
Step-by-step explanation:
The exterior angle is the sum of the 2 opposite interior angles of a triangle
6x+1 = 79+2x+10
Combine like terms
6x+1 = 89+2x
Subtract 2x from each side
6x-2x+1= 2x-2x+89
4x+1 = 89
Subtract 1 from each side
4x+1-1 =89-1
4x = 88
Divide by 4
4x/4 = 88/4
x =22
