3(b-13)=15

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Solution for 3(b-13)=15 equation: 


Simplifying
3(b + -13) = 15

Reorder the terms:
3(-13 + b) = 15
(-13 * 3 + b * 3) = 15
(-39 + 3b) = 15

Solving
-39 + 3b = 15

Solving for variable 'b'.

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

Add '39' to each side of the equation.
-39 + 39 + 3b = 15 + 39

Combine like terms: -39 + 39 = 0
0 + 3b = 15 + 39
3b = 15 + 39

Combine like terms: 15 + 39 = 54
3b = 54

Divide each side by '3'.
b = 18

Simplifying
b = 18

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