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

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

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

Reorder the terms:
-4 + -7b + -3(3 + 7b) = 0
-4 + -7b + (3 * -3 + 7b * -3) = 0
-4 + -7b + (-9 + -21b) = 0

Reorder the terms:
-4 + -9 + -7b + -21b = 0

Combine like terms: -4 + -9 = -13
-13 + -7b + -21b = 0

Combine like terms: -7b + -21b = -28b
-13 + -28b = 0

Solving
-13 + -28b = 0

Solving for variable 'b'.

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

Add '13' to each side of the equation.
-13 + 13 + -28b = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -28b = 0 + 13
-28b = 0 + 13

Combine like terms: 0 + 13 = 13
-28b = 13

Divide each side by '-28'.
b = -0.4642857143

Simplifying
b = -0.4642857143