3(-4b-1)+4(5-7b)=

Solution for 3(-4b-1)+4(5-7b)= equation:

Simplifying
3(-4b + -1) + 4(5 + -7b) = 0

Reorder the terms:
3(-1 + -4b) + 4(5 + -7b) = 0
(-1 * 3 + -4b * 3) + 4(5 + -7b) = 0
(-3 + -12b) + 4(5 + -7b) = 0
-3 + -12b + (5 * 4 + -7b * 4) = 0
-3 + -12b + (20 + -28b) = 0

Reorder the terms:
-3 + 20 + -12b + -28b = 0

Combine like terms: -3 + 20 = 17
17 + -12b + -28b = 0

Combine like terms: -12b + -28b = -40b
17 + -40b = 0

Solving
17 + -40b = 0

Solving for variable 'b'.

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

Add '-17' to each side of the equation.
17 + -17 + -40b = 0 + -17

Combine like terms: 17 + -17 = 0
0 + -40b = 0 + -17
-40b = 0 + -17

Combine like terms: 0 + -17 = -17
-40b = -17

Divide each side by '-40'.
b = 0.425

Simplifying
b = 0.425