What is the slope of the line 5x - 2y = -10?

First of all subtract 5x to both sides.

-2y=-5x+10

Divide the by -2:

y=5/2y-5

The slope is the coefficient of x, which is m=5/2.
 Hope this helps!

Since this is a first grade equation, there is only one solution (or maybe not)

Let's solve it.

Move unknown terms to the left of the equal with changed sign and known terms to the right of the equal, with changed sign.

11x-7x = 15-25

4x = -10

Since x is multiplied by 4, divide both terms for 4

4x/4 = -10/4

x = -10/4