8X - 6X = -18
2X = -18
X = -9.
Hope this helps!
Yes,you can.
-- If it's a rectangle, make it more square ... make the length and width
more nearly equal.
-- No matter what shape it is, make it more like a circle. The circle
has the most possible area inside the smallest possible perimeter.
Well the dependent variable is .75, and the independent variable is 10.
So,
.75x + 10 would be the equation, the number of miles representing x.