Answer:
x=15 (not sure what you have to round to, so there's a few decimals)
Explanation:
Since the two lines are parallel, angle 7x-10 and angle 6x-5 must add to equal 180 (total angle in a straight line). Given this, you make the equation 13x - 15 = 180. From here, you add 15 to both sides. This gets you 13x = 195. Then, you divide 195 by 13, getting you the value of x (because x is isolated now), which equals 15. Hope this helps!