9+b=13

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Solution for 9+b=13 equation: 


Simplifying
9 + b = 13

Solving
9 + b = 13

Solving for variable 'b'.

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

Add '-9' to each side of the equation.
9 + -9 + b = 13 + -9

Combine like terms: 9 + -9 = 0
0 + b = 13 + -9
b = 13 + -9

Combine like terms: 13 + -9 = 4
b = 4

Simplifying
b = 4

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