13=31-b-10.5

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Solution for 13=31-b-10.5 equation:


Simplifying
13 = 31 + -1b + -10.5

Reorder the terms:
13 = 31 + -10.5 + -1b

Combine like terms: 31 + -10.5 = 20.5
13 = 20.5 + -1b

Solving
13 = 20.5 + -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.
13 + b = 20.5 + -1b + b

Combine like terms: -1b + b = 0
13 + b = 20.5 + 0
13 + b = 20.5

Add '-13' to each side of the equation.
13 + -13 + b = 20.5 + -13

Combine like terms: 13 + -13 = 0
0 + b = 20.5 + -13
b = 20.5 + -13

Combine like terms: 20.5 + -13 = 7.5
b = 7.5

Simplifying
b = 7.5

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