9=3(3b-4)-2(4b+5)

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Solution for 9=3(3b-4)-2(4b+5) equation:


Simplifying
9 = 3(3b + -4) + -2(4b + 5)

Reorder the terms:
9 = 3(-4 + 3b) + -2(4b + 5)
9 = (-4 * 3 + 3b * 3) + -2(4b + 5)
9 = (-12 + 9b) + -2(4b + 5)

Reorder the terms:
9 = -12 + 9b + -2(5 + 4b)
9 = -12 + 9b + (5 * -2 + 4b * -2)
9 = -12 + 9b + (-10 + -8b)

Reorder the terms:
9 = -12 + -10 + 9b + -8b

Combine like terms: -12 + -10 = -22
9 = -22 + 9b + -8b

Combine like terms: 9b + -8b = 1b
9 = -22 + 1b

Solving
9 = -22 + 1b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
9 + -1b = -22 + 1b + -1b

Combine like terms: 1b + -1b = 0
9 + -1b = -22 + 0
9 + -1b = -22

Add '-9' to each side of the equation.
9 + -9 + -1b = -22 + -9

Combine like terms: 9 + -9 = 0
0 + -1b = -22 + -9
-1b = -22 + -9

Combine like terms: -22 + -9 = -31
-1b = -31

Divide each side by '-1'.
b = 31

Simplifying
b = 31

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