3b-9=4b

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Solution for 3b-9=4b equation:


Simplifying
3b + -9 = 4b

Reorder the terms:
-9 + 3b = 4b

Solving
-9 + 3b = 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
-9 + 3b + -4b = 4b + -4b

Combine like terms: 3b + -4b = -1b
-9 + -1b = 4b + -4b

Combine like terms: 4b + -4b = 0
-9 + -1b = 0

Add '9' to each side of the equation.
-9 + 9 + -1b = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -1b = 0 + 9
-1b = 0 + 9

Combine like terms: 0 + 9 = 9
-1b = 9

Divide each side by '-1'.
b = -9

Simplifying
b = -9

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