5b-4-7b-8=

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Solution for 5b-4-7b-8= equation:


Simplifying
5b + -4 + -7b + -8 = 0

Reorder the terms:
-4 + -8 + 5b + -7b = 0

Combine like terms: -4 + -8 = -12
-12 + 5b + -7b = 0

Combine like terms: 5b + -7b = -2b
-12 + -2b = 0

Solving
-12 + -2b = 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 + -2b = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -2b = 0 + 12
-2b = 0 + 12

Combine like terms: 0 + 12 = 12
-2b = 12

Divide each side by '-2'.
b = -6

Simplifying
b = -6

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