-(3-9b)=7b+5

Solution for -(3-9b)=7b+5 equation:

Simplifying
-1(3 + -9b) = 7b + 5
(3 * -1 + -9b * -1) = 7b + 5
(-3 + 9b) = 7b + 5

Reorder the terms:
-3 + 9b = 5 + 7b

Solving
-3 + 9b = 5 + 7b

Solving for variable 'b'.

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

Add '-7b' to each side of the equation.
-3 + 9b + -7b = 5 + 7b + -7b

Combine like terms: 9b + -7b = 2b
-3 + 2b = 5 + 7b + -7b

Combine like terms: 7b + -7b = 0
-3 + 2b = 5 + 0
-3 + 2b = 5

Add '3' to each side of the equation.
-3 + 3 + 2b = 5 + 3

Combine like terms: -3 + 3 = 0
0 + 2b = 5 + 3
2b = 5 + 3

Combine like terms: 5 + 3 = 8
2b = 8

Divide each side by '2'.
b = 4

Simplifying
b = 4