b-5+2b=21

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Solution for b-5+2b=21 equation:


Simplifying
b + -5 + 2b = 21

Reorder the terms:
-5 + b + 2b = 21

Combine like terms: b + 2b = 3b
-5 + 3b = 21

Solving
-5 + 3b = 21

Solving for variable 'b'.

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

Add '5' to each side of the equation.
-5 + 5 + 3b = 21 + 5

Combine like terms: -5 + 5 = 0
0 + 3b = 21 + 5
3b = 21 + 5

Combine like terms: 21 + 5 = 26
3b = 26

Divide each side by '3'.
b = 8.666666667

Simplifying
b = 8.666666667

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