b+17=21

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Solution for b+17=21 equation: 


Simplifying
b + 17 = 21

Reorder the terms:
17 + b = 21

Solving
17 + b = 21

Solving for variable 'b'.

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

Add '-17' to each side of the equation.
17 + -17 + b = 21 + -17

Combine like terms: 17 + -17 = 0
0 + b = 21 + -17
b = 21 + -17

Combine like terms: 21 + -17 = 4
b = 4

Simplifying
b = 4

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