-300=-2(-3b)

Solution for -300=-2(-3b) equation:

Simplifying
-300 = -2(-3b)

Remove parenthesis around (-3b)
-300 = -2 * -3b

Multiply -2 * -3
-300 = 6b

Solving
-300 = 6b

Solving for variable 'b'.

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

Add '-6b' to each side of the equation.
-300 + -6b = 6b + -6b

Combine like terms: 6b + -6b = 0
-300 + -6b = 0

Add '300' to each side of the equation.
-300 + 300 + -6b = 0 + 300

Combine like terms: -300 + 300 = 0
0 + -6b = 0 + 300
-6b = 0 + 300

Combine like terms: 0 + 300 = 300
-6b = 300

Divide each side by '-6'.
b = -50

Simplifying
b = -50