5b-4-7b-9=

Solution for 5b-4-7b-9= equation:

Simplifying
5b + -4 + -7b + -9 = 0

Reorder the terms:
-4 + -9 + 5b + -7b = 0

Combine like terms: -4 + -9 = -13
-13 + 5b + -7b = 0

Combine like terms: 5b + -7b = -2b
-13 + -2b = 0

Solving
-13 + -2b = 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 + -2b = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -2b = 0 + 13
-2b = 0 + 13

Combine like terms: 0 + 13 = 13
-2b = 13

Divide each side by '-2'.
b = -6.5

Simplifying
b = -6.5