-18=4b+5b

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Solution for -18=4b+5b equation:


Simplifying
-18 = 4b + 5b

Combine like terms: 4b + 5b = 9b
-18 = 9b

Solving
-18 = 9b

Solving for variable 'b'.

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

Add '-9b' to each side of the equation.
-18 + -9b = 9b + -9b

Combine like terms: 9b + -9b = 0
-18 + -9b = 0

Add '18' to each side of the equation.
-18 + 18 + -9b = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -9b = 0 + 18
-9b = 0 + 18

Combine like terms: 0 + 18 = 18
-9b = 18

Divide each side by '-9'.
b = -2

Simplifying
b = -2

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