3b+15=-9

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Solution for 3b+15=-9 equation: 


Simplifying
3b + 15 = -9

Reorder the terms:
15 + 3b = -9

Solving
15 + 3b = -9

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 + 3b = -9 + -15

Combine like terms: 15 + -15 = 0
0 + 3b = -9 + -15
3b = -9 + -15

Combine like terms: -9 + -15 = -24
3b = -24

Divide each side by '3'.
b = -8

Simplifying
b = -8

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