-129=3b-6(1-5b)

Solution for -129=3b-6(1-5b) equation:

Simplifying
-129 = 3b + -6(1 + -5b)
-129 = 3b + (1 * -6 + -5b * -6)
-129 = 3b + (-6 + 30b)

Reorder the terms:
-129 = -6 + 3b + 30b

Combine like terms: 3b + 30b = 33b
-129 = -6 + 33b

Solving
-129 = -6 + 33b

Solving for variable 'b'.

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

Add '-33b' to each side of the equation.
-129 + -33b = -6 + 33b + -33b

Combine like terms: 33b + -33b = 0
-129 + -33b = -6 + 0
-129 + -33b = -6

Add '129' to each side of the equation.
-129 + 129 + -33b = -6 + 129

Combine like terms: -129 + 129 = 0
0 + -33b = -6 + 129
-33b = -6 + 129

Combine like terms: -6 + 129 = 123
-33b = 123

Divide each side by '-33'.
b = -3.727272727

Simplifying
b = -3.727272727