Answer:
The equation of the line L is 
Step-by-step explanation:
we know that
The line y=7
Is a horizontal line (parallel line to the x-axis)
The slope of a horizontal line is equal to zero
A line L perpendicular to the given line must be a vertical line (parallel to the y-axis)
The slope of the line L is undefined
The line L passes through the point (2,-5)
therefore
The equation of the line L will be equal to the x-coordinate of the given point

Answer:
no solution
Step-by-step explanation:
There are no values of x that make the equation true.
5. -6a-48
6. 36x+4
7. 30n+40
8. 1.8m+2
Yess