5=a+b+(-a+b-9)

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Solution for 5=a+b+(-a+b-9) equation:


Simplifying
5 = a + b + (-1a + b + -9)

Reorder the terms:
5 = a + b + (-9 + -1a + b)

Remove parenthesis around (-9 + -1a + b)
5 = a + b + -9 + -1a + b

Reorder the terms:
5 = -9 + a + -1a + b + b

Combine like terms: a + -1a = 0
5 = -9 + 0 + b + b
5 = -9 + b + b

Combine like terms: b + b = 2b
5 = -9 + 2b

Solving
5 = -9 + 2b

Solving for variable 'b'.

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

Add '-2b' to each side of the equation.
5 + -2b = -9 + 2b + -2b

Combine like terms: 2b + -2b = 0
5 + -2b = -9 + 0
5 + -2b = -9

Add '-5' to each side of the equation.
5 + -5 + -2b = -9 + -5

Combine like terms: 5 + -5 = 0
0 + -2b = -9 + -5
-2b = -9 + -5

Combine like terms: -9 + -5 = -14
-2b = -14

Divide each side by '-2'.
b = 7

Simplifying
b = 7

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