3b-11+b-4=21

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Solution for 3b-11+b-4=21 equation:


Simplifying
3b + -11 + b + -4 = 21

Reorder the terms:
-11 + -4 + 3b + b = 21

Combine like terms: -11 + -4 = -15
-15 + 3b + b = 21

Combine like terms: 3b + b = 4b
-15 + 4b = 21

Solving
-15 + 4b = 21

Solving for variable 'b'.

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

Add '15' to each side of the equation.
-15 + 15 + 4b = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 4b = 21 + 15
4b = 21 + 15

Combine like terms: 21 + 15 = 36
4b = 36

Divide each side by '4'.
b = 9

Simplifying
b = 9

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