4b-21=28

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Solution for 4b-21=28 equation: 


Simplifying
4b + -21 = 28

Reorder the terms:
-21 + 4b = 28

Solving
-21 + 4b = 28

Solving for variable 'b'.

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

Add '21' to each side of the equation.
-21 + 21 + 4b = 28 + 21

Combine like terms: -21 + 21 = 0
0 + 4b = 28 + 21
4b = 28 + 21

Combine like terms: 28 + 21 = 49
4b = 49

Divide each side by '4'.
b = 12.25

Simplifying
b = 12.25

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