-3(-4-b)=0.3(b-4)

Solution for -3(-4-b)=0.3(b-4) equation:

Simplifying
-3(-4 + -1b) = 0.3(b + -4)
(-4 * -3 + -1b * -3) = 0.3(b + -4)
(12 + 3b) = 0.3(b + -4)

Reorder the terms:
12 + 3b = 0.3(-4 + b)
12 + 3b = (-4 * 0.3 + b * 0.3)
12 + 3b = (-1.2 + 0.3b)

Solving
12 + 3b = -1.2 + 0.3b

Solving for variable 'b'.

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

Add '-0.3b' to each side of the equation.
12 + 3b + -0.3b = -1.2 + 0.3b + -0.3b

Combine like terms: 3b + -0.3b = 2.7b
12 + 2.7b = -1.2 + 0.3b + -0.3b

Combine like terms: 0.3b + -0.3b = 0.0
12 + 2.7b = -1.2 + 0.0
12 + 2.7b = -1.2

Add '-12' to each side of the equation.
12 + -12 + 2.7b = -1.2 + -12

Combine like terms: 12 + -12 = 0
0 + 2.7b = -1.2 + -12
2.7b = -1.2 + -12

Combine like terms: -1.2 + -12 = -13.2
2.7b = -13.2

Divide each side by '2.7'.
b = -4.888888889

Simplifying
b = -4.888888889