4b+9=-8b-15

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Solution for 4b+9=-8b-15 equation: 


Simplifying
4b + 9 = -8b + -15

Reorder the terms:
9 + 4b = -8b + -15

Reorder the terms:
9 + 4b = -15 + -8b

Solving
9 + 4b = -15 + -8b

Solving for variable 'b'.

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

Add '8b' to each side of the equation.
9 + 4b + 8b = -15 + -8b + 8b

Combine like terms: 4b + 8b = 12b
9 + 12b = -15 + -8b + 8b

Combine like terms: -8b + 8b = 0
9 + 12b = -15 + 0
9 + 12b = -15

Add '-9' to each side of the equation.
9 + -9 + 12b = -15 + -9

Combine like terms: 9 + -9 = 0
0 + 12b = -15 + -9
12b = -15 + -9

Combine like terms: -15 + -9 = -24
12b = -24

Divide each side by '12'.
b = -2

Simplifying
b = -2

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