b+2b+(21+b)=145

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Solution for b+2b+(21+b)=145 equation:


Simplifying
b + 2b + (21 + b) = 145

Remove parenthesis around (21 + b)
b + 2b + 21 + b = 145

Reorder the terms:
21 + b + 2b + b = 145

Combine like terms: b + 2b = 3b
21 + 3b + b = 145

Combine like terms: 3b + b = 4b
21 + 4b = 145

Solving
21 + 4b = 145

Solving for variable 'b'.

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

Add '-21' to each side of the equation.
21 + -21 + 4b = 145 + -21

Combine like terms: 21 + -21 = 0
0 + 4b = 145 + -21
4b = 145 + -21

Combine like terms: 145 + -21 = 124
4b = 124

Divide each side by '4'.
b = 31

Simplifying
b = 31

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