y-1=-.50(x+1)

Solution for y-1=-.50(x+1) equation:

Simplifying
y + -1 = -0.50(x + 1)

Reorder the terms:
-1 + y = -0.50(x + 1)

Reorder the terms:
-1 + y = -0.50(1 + x)
-1 + y = (1 * -0.50 + x * -0.50)
-1 + y = (-0.5 + -0.50x)

Solving
-1 + y = -0.5 + -0.50x

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + y = -0.5 + 1 + -0.50x

Combine like terms: -1 + 1 = 0
0 + y = -0.5 + 1 + -0.50x
y = -0.5 + 1 + -0.50x

Combine like terms: -0.5 + 1 = 0.5
y = 0.5 + -0.50x

Simplifying
y = 0.5 + -0.50x