-3(4-5b)=9(b+4)

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Solution for -3(4-5b)=9(b+4) equation:


Simplifying
-3(4 + -5b) = 9(b + 4)
(4 * -3 + -5b * -3) = 9(b + 4)
(-12 + 15b) = 9(b + 4)

Reorder the terms:
-12 + 15b = 9(4 + b)
-12 + 15b = (4 * 9 + b * 9)
-12 + 15b = (36 + 9b)

Solving
-12 + 15b = 36 + 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.
-12 + 15b + -9b = 36 + 9b + -9b

Combine like terms: 15b + -9b = 6b
-12 + 6b = 36 + 9b + -9b

Combine like terms: 9b + -9b = 0
-12 + 6b = 36 + 0
-12 + 6b = 36

Add '12' to each side of the equation.
-12 + 12 + 6b = 36 + 12

Combine like terms: -12 + 12 = 0
0 + 6b = 36 + 12
6b = 36 + 12

Combine like terms: 36 + 12 = 48
6b = 48

Divide each side by '6'.
b = 8

Simplifying
b = 8

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