-81=-4+7(6b-5)

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Solution for -81=-4+7(6b-5) equation:


Simplifying
-81 = -4 + 7(6b + -5)

Reorder the terms:
-81 = -4 + 7(-5 + 6b)
-81 = -4 + (-5 * 7 + 6b * 7)
-81 = -4 + (-35 + 42b)

Combine like terms: -4 + -35 = -39
-81 = -39 + 42b

Solving
-81 = -39 + 42b

Solving for variable 'b'.

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

Add '-42b' to each side of the equation.
-81 + -42b = -39 + 42b + -42b

Combine like terms: 42b + -42b = 0
-81 + -42b = -39 + 0
-81 + -42b = -39

Add '81' to each side of the equation.
-81 + 81 + -42b = -39 + 81

Combine like terms: -81 + 81 = 0
0 + -42b = -39 + 81
-42b = -39 + 81

Combine like terms: -39 + 81 = 42
-42b = 42

Divide each side by '-42'.
b = -1

Simplifying
b = -1

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