Answer: x = 20
Explanation:
Since all of these lines are parallel, as given, we know that the angle 6x and the angle 7x-20 are corresponding angles. This means that they are congruent. Using this information, we can create an equation and solve.
Given:
6x = 7x - 20
Subtract 7x from both sides of the equation:
-x = -20
Divide both sides of the equation by -1:
x = 20