-18+b=-21

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Solution for -18+b=-21 equation: 


Simplifying
-18 + b = -21

Solving
-18 + b = -21

Solving for variable 'b'.

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

Add '18' to each side of the equation.
-18 + 18 + b = -21 + 18

Combine like terms: -18 + 18 = 0
0 + b = -21 + 18
b = -21 + 18

Combine like terms: -21 + 18 = -3
b = -3

Simplifying
b = -3

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