2b+3b+6=21

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Solution for 2b+3b+6=21 equation: 


Simplifying
2b + 3b + 6 = 21

Reorder the terms:
6 + 2b + 3b = 21

Combine like terms: 2b + 3b = 5b
6 + 5b = 21

Solving
6 + 5b = 21

Solving for variable 'b'.

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

Add '-6' to each side of the equation.
6 + -6 + 5b = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 5b = 21 + -6
5b = 21 + -6

Combine like terms: 21 + -6 = 15
5b = 15

Divide each side by '5'.
b = 3

Simplifying
b = 3

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