2b+1+8=21

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Solution for 2b+1+8=21 equation: 


Simplifying
2b + 1 + 8 = 21

Reorder the terms:
1 + 8 + 2b = 21

Combine like terms: 1 + 8 = 9
9 + 2b = 21

Solving
9 + 2b = 21

Solving for variable 'b'.

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

Add '-9' to each side of the equation.
9 + -9 + 2b = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 2b = 21 + -9
2b = 21 + -9

Combine like terms: 21 + -9 = 12
2b = 12

Divide each side by '2'.
b = 6

Simplifying
b = 6

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