-3=3b+21

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Solution for -3=3b+21 equation:


Simplifying
-3 = 3b + 21

Reorder the terms:
-3 = 21 + 3b

Solving
-3 = 21 + 3b

Solving for variable 'b'.

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

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

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

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

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

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

Divide each side by '-3'.
b = -8

Simplifying
b = -8

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