find the equation for the line that passes through the point (-5,-1) and that os parallel to the line with the equation -x+2y=5
-x+2y = 5
2 y = x + 5
y = (1/2)x + (5/2)
so slope = 1/2 = .5
y = .5 x + b
-1 = .5(-5) + b
-1 +2.5 = b
b = 1.5
so
y = .5 x + 1.5
2 y = x + 3