138=-3(-7b-2)+6

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Solution for 138=-3(-7b-2)+6 equation:


Simplifying
138 = -3(-7b + -2) + 6

Reorder the terms:
138 = -3(-2 + -7b) + 6
138 = (-2 * -3 + -7b * -3) + 6
138 = (6 + 21b) + 6

Reorder the terms:
138 = 6 + 6 + 21b

Combine like terms: 6 + 6 = 12
138 = 12 + 21b

Solving
138 = 12 + 21b

Solving for variable 'b'.

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

Add '-21b' to each side of the equation.
138 + -21b = 12 + 21b + -21b

Combine like terms: 21b + -21b = 0
138 + -21b = 12 + 0
138 + -21b = 12

Add '-138' to each side of the equation.
138 + -138 + -21b = 12 + -138

Combine like terms: 138 + -138 = 0
0 + -21b = 12 + -138
-21b = 12 + -138

Combine like terms: 12 + -138 = -126
-21b = -126

Divide each side by '-21'.
b = 6

Simplifying
b = 6

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