-(-0.3+6y)=12.3+4y

Solution for -(-0.3+6y)=12.3+4y equation:

Simplifying
-1(-0.3 + 6y) = 12.3 + 4y
(-0.3 * -1 + 6y * -1) = 12.3 + 4y
(0.3 + -6y) = 12.3 + 4y

Solving
0.3 + -6y = 12.3 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
0.3 + -6y + -4y = 12.3 + 4y + -4y

Combine like terms: -6y + -4y = -10y
0.3 + -10y = 12.3 + 4y + -4y

Combine like terms: 4y + -4y = 0
0.3 + -10y = 12.3 + 0
0.3 + -10y = 12.3

Add '-0.3' to each side of the equation.
0.3 + -0.3 + -10y = 12.3 + -0.3

Combine like terms: 0.3 + -0.3 = 0.0
0.0 + -10y = 12.3 + -0.3
-10y = 12.3 + -0.3

Combine like terms: 12.3 + -0.3 = 12
-10y = 12

Divide each side by '-10'.
y = -1.2

Simplifying
y = -1.2