30=6b+9-b

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Solution for 30=6b+9-b equation:


Simplifying
30 = 6b + 9 + -1b

Reorder the terms:
30 = 9 + 6b + -1b

Combine like terms: 6b + -1b = 5b
30 = 9 + 5b

Solving
30 = 9 + 5b

Solving for variable 'b'.

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

Add '-5b' to each side of the equation.
30 + -5b = 9 + 5b + -5b

Combine like terms: 5b + -5b = 0
30 + -5b = 9 + 0
30 + -5b = 9

Add '-30' to each side of the equation.
30 + -30 + -5b = 9 + -30

Combine like terms: 30 + -30 = 0
0 + -5b = 9 + -30
-5b = 9 + -30

Combine like terms: 9 + -30 = -21
-5b = -21

Divide each side by '-5'.
b = 4.2

Simplifying
b = 4.2

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