-7b+3(-4+7b)=

Solution for -7b+3(-4+7b)= equation:

Simplifying
-7b + 3(-4 + 7b) = 0
-7b + (-4 * 3 + 7b * 3) = 0
-7b + (-12 + 21b) = 0

Reorder the terms:
-12 + -7b + 21b = 0

Combine like terms: -7b + 21b = 14b
-12 + 14b = 0

Solving
-12 + 14b = 0

Solving for variable 'b'.

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

Add '12' to each side of the equation.
-12 + 12 + 14b = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 14b = 0 + 12
14b = 0 + 12

Combine like terms: 0 + 12 = 12
14b = 12

Divide each side by '14'.
b = 0.8571428571

Simplifying
b = 0.8571428571