3b-19=b+21

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Solution for 3b-19=b+21 equation:


Simplifying
3b + -19 = b + 21

Reorder the terms:
-19 + 3b = b + 21

Reorder the terms:
-19 + 3b = 21 + b

Solving
-19 + 3b = 21 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
-19 + 3b + -1b = 21 + b + -1b

Combine like terms: 3b + -1b = 2b
-19 + 2b = 21 + b + -1b

Combine like terms: b + -1b = 0
-19 + 2b = 21 + 0
-19 + 2b = 21

Add '19' to each side of the equation.
-19 + 19 + 2b = 21 + 19

Combine like terms: -19 + 19 = 0
0 + 2b = 21 + 19
2b = 21 + 19

Combine like terms: 21 + 19 = 40
2b = 40

Divide each side by '2'.
b = 20

Simplifying
b = 20

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