15=6-(b+9)

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Solution for 15=6-(b+9) equation:


Simplifying
15 = 6 + -1(b + 9)

Reorder the terms:
15 = 6 + -1(9 + b)
15 = 6 + (9 * -1 + b * -1)
15 = 6 + (-9 + -1b)

Combine like terms: 6 + -9 = -3
15 = -3 + -1b

Solving
15 = -3 + -1b

Solving for variable 'b'.

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

Add 'b' to each side of the equation.
15 + b = -3 + -1b + b

Combine like terms: -1b + b = 0
15 + b = -3 + 0
15 + b = -3

Add '-15' to each side of the equation.
15 + -15 + b = -3 + -15

Combine like terms: 15 + -15 = 0
0 + b = -3 + -15
b = -3 + -15

Combine like terms: -3 + -15 = -18
b = -18

Simplifying
b = -18

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