Solve for x
what kind of angle
and substitute it back in

Congruent angle or alternate interior angles

X=6

The angle is 85 degrees

So the angles in this are alternate interior angles. All alternate interior angle are congruent, so to find x, you make the equation equal 85. So it would be 14x+1=85. Next you isolate the variable by subtracting the 1 to the other side then dividing the entire expression by 14. In the end you should find that x=6. I assume that substituting it back in is substituting the x back into the expression. So just replace x with 6. 14(6)+1=85; 84+1=85; 85=85.

The answer is x=6, they are alternate interior angles, and substituting the new x into the expression should result in 14(6)+1=85; 84+1=85; 85=85.

Hope this helps, good luck! :)