4b+2b-3=-21

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Solution for 4b+2b-3=-21 equation:


Simplifying
4b + 2b + -3 = -21

Reorder the terms:
-3 + 4b + 2b = -21

Combine like terms: 4b + 2b = 6b
-3 + 6b = -21

Solving
-3 + 6b = -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 + 6b = -21 + 3

Combine like terms: -3 + 3 = 0
0 + 6b = -21 + 3
6b = -21 + 3

Combine like terms: -21 + 3 = -18
6b = -18

Divide each side by '6'.
b = -3

Simplifying
b = -3

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