b-3+6b=21

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


Simplifying
b + -3 + 6b = 21

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

Combine like terms: b + 6b = 7b
-3 + 7b = 21

Solving
-3 + 7b = 21

Solving for variable 'b'.

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

Add '3' to each side of the equation.
-3 + 3 + 7b = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 7b = 21 + 3
7b = 21 + 3

Combine like terms: 21 + 3 = 24
7b = 24

Divide each side by '7'.
b = 3.428571429

Simplifying
b = 3.428571429

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