31-b=28

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Solution for 31-b=28 equation: 


Simplifying
31 + -1b = 28

Solving
31 + -1b = 28

Solving for variable 'b'.

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

Add '-31' to each side of the equation.
31 + -31 + -1b = 28 + -31

Combine like terms: 31 + -31 = 0
0 + -1b = 28 + -31
-1b = 28 + -31

Combine like terms: 28 + -31 = -3
-1b = -3

Divide each side by '-1'.
b = 3

Simplifying
b = 3

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