81=-8(1-2b)-7

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Solution for 81=-8(1-2b)-7 equation:


Simplifying
81 = -8(1 + -2b) + -7
81 = (1 * -8 + -2b * -8) + -7
81 = (-8 + 16b) + -7

Reorder the terms:
81 = -8 + -7 + 16b

Combine like terms: -8 + -7 = -15
81 = -15 + 16b

Solving
81 = -15 + 16b

Solving for variable 'b'.

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

Add '-16b' to each side of the equation.
81 + -16b = -15 + 16b + -16b

Combine like terms: 16b + -16b = 0
81 + -16b = -15 + 0
81 + -16b = -15

Add '-81' to each side of the equation.
81 + -81 + -16b = -15 + -81

Combine like terms: 81 + -81 = 0
0 + -16b = -15 + -81
-16b = -15 + -81

Combine like terms: -15 + -81 = -96
-16b = -96

Divide each side by '-16'.
b = 6

Simplifying
b = 6

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