[3b+4]=13

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Solution for [3b+4]=13 equation: 


Simplifying
[3b + 4] = 13

Reorder the terms:
[4 + 3b] = 13

Remove brackets around [4 + 3b]
4 + 3b = 13

Solving
4 + 3b = 13

Solving for variable 'b'.

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

Add '-4' to each side of the equation.
4 + -4 + 3b = 13 + -4

Combine like terms: 4 + -4 = 0
0 + 3b = 13 + -4
3b = 13 + -4

Combine like terms: 13 + -4 = 9
3b = 9

Divide each side by '3'.
b = 3

Simplifying
b = 3

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