-21+4b=6(8b-9)

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Solution for -21+4b=6(8b-9) equation:


Simplifying
-21 + 4b = 6(8b + -9)

Reorder the terms:
-21 + 4b = 6(-9 + 8b)
-21 + 4b = (-9 * 6 + 8b * 6)
-21 + 4b = (-54 + 48b)

Solving
-21 + 4b = -54 + 48b

Solving for variable 'b'.

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

Add '-48b' to each side of the equation.
-21 + 4b + -48b = -54 + 48b + -48b

Combine like terms: 4b + -48b = -44b
-21 + -44b = -54 + 48b + -48b

Combine like terms: 48b + -48b = 0
-21 + -44b = -54 + 0
-21 + -44b = -54

Add '21' to each side of the equation.
-21 + 21 + -44b = -54 + 21

Combine like terms: -21 + 21 = 0
0 + -44b = -54 + 21
-44b = -54 + 21

Combine like terms: -54 + 21 = -33
-44b = -33

Divide each side by '-44'.
b = 0.75

Simplifying
b = 0.75

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