6+0.5y=-6-(-0.5y)

Solution for 6+0.5y=-6-(-0.5y) equation:

Simplifying
6 + 0.5y = -6 + -1(-0.5y)

Remove parenthesis around (-0.5y)
6 + 0.5y = -6 + -1 * -0.5y

Multiply -1 * -0.5
6 + 0.5y = -6 + 0.5y

Add '-0.5y' to each side of the equation.
6 + 0.5y + -0.5y = -6 + 0.5y + -0.5y

Combine like terms: 0.5y + -0.5y = 0.0
6 + 0.0 = -6 + 0.5y + -0.5y
6 = -6 + 0.5y + -0.5y

Combine like terms: 0.5y + -0.5y = 0.0
6 = -6 + 0.0
6 = -6

Solving
6 = -6

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.