18=20-b

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Solution for 18=20-b equation:


Simplifying
18 = 20 + -1b

Solving
18 = 20 + -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.
18 + b = 20 + -1b + b

Combine like terms: -1b + b = 0
18 + b = 20 + 0
18 + b = 20

Add '-18' to each side of the equation.
18 + -18 + b = 20 + -18

Combine like terms: 18 + -18 = 0
0 + b = 20 + -18
b = 20 + -18

Combine like terms: 20 + -18 = 2
b = 2

Simplifying
b = 2

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