69=b+(b-5)+2(b-5)

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Solution for 69=b+(b-5)+2(b-5) equation:


Simplifying
69 = b + (b + -5) + 2(b + -5)

Reorder the terms:
69 = b + (-5 + b) + 2(b + -5)

Remove parenthesis around (-5 + b)
69 = b + -5 + b + 2(b + -5)

Reorder the terms:
69 = b + -5 + b + 2(-5 + b)
69 = b + -5 + b + (-5 * 2 + b * 2)
69 = b + -5 + b + (-10 + 2b)

Reorder the terms:
69 = -5 + -10 + b + b + 2b

Combine like terms: -5 + -10 = -15
69 = -15 + b + b + 2b

Combine like terms: b + b = 2b
69 = -15 + 2b + 2b

Combine like terms: 2b + 2b = 4b
69 = -15 + 4b

Solving
69 = -15 + 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.
69 + -4b = -15 + 4b + -4b

Combine like terms: 4b + -4b = 0
69 + -4b = -15 + 0
69 + -4b = -15

Add '-69' to each side of the equation.
69 + -69 + -4b = -15 + -69

Combine like terms: 69 + -69 = 0
0 + -4b = -15 + -69
-4b = -15 + -69

Combine like terms: -15 + -69 = -84
-4b = -84

Divide each side by '-4'.
b = 21

Simplifying
b = 21

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