12=6+2(-2b-7)

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Solution for 12=6+2(-2b-7) equation:


Simplifying
12 = 6 + 2(-2b + -7)

Reorder the terms:
12 = 6 + 2(-7 + -2b)
12 = 6 + (-7 * 2 + -2b * 2)
12 = 6 + (-14 + -4b)

Combine like terms: 6 + -14 = -8
12 = -8 + -4b

Solving
12 = -8 + -4b

Solving for variable 'b'.

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

Add '4b' to each side of the equation.
12 + 4b = -8 + -4b + 4b

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

Add '-12' to each side of the equation.
12 + -12 + 4b = -8 + -12

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

Combine like terms: -8 + -12 = -20
4b = -20

Divide each side by '4'.
b = -5

Simplifying
b = -5

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