Question

Could someone tell me why this is x=9?

(Format)Find The Equation of each line in slope y intercept form.
The line passes through(9,5) and is parallel to the line 4x + 3 = 0

Answer 1

because it’s parallel to 4x+3=0, we know the gradient of the line is 4 so it will be something like 4x+c=y
then you sub in (9,5), so x=9