(9b-1)-2(4b+40)=-2

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Solution for (9b-1)-2(4b+40)=-2 equation:


Simplifying
(9b + -1) + -2(4b + 40) = -2

Reorder the terms:
(-1 + 9b) + -2(4b + 40) = -2

Remove parenthesis around (-1 + 9b)
-1 + 9b + -2(4b + 40) = -2

Reorder the terms:
-1 + 9b + -2(40 + 4b) = -2
-1 + 9b + (40 * -2 + 4b * -2) = -2
-1 + 9b + (-80 + -8b) = -2

Reorder the terms:
-1 + -80 + 9b + -8b = -2

Combine like terms: -1 + -80 = -81
-81 + 9b + -8b = -2

Combine like terms: 9b + -8b = 1b
-81 + 1b = -2

Solving
-81 + 1b = -2

Solving for variable 'b'.

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

Add '81' to each side of the equation.
-81 + 81 + 1b = -2 + 81

Combine like terms: -81 + 81 = 0
0 + 1b = -2 + 81
1b = -2 + 81

Combine like terms: -2 + 81 = 79
1b = 79

Divide each side by '1'.
b = 79

Simplifying
b = 79

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