3-b=13

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Solution for 3-b=13 equation: 


Simplifying
3 + -1b = 13

Solving
3 + -1b = 13

Solving for variable 'b'.

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

Add '-3' to each side of the equation.
3 + -3 + -1b = 13 + -3

Combine like terms: 3 + -3 = 0
0 + -1b = 13 + -3
-1b = 13 + -3

Combine like terms: 13 + -3 = 10
-1b = 10

Divide each side by '-1'.
b = -10

Simplifying
b = -10

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