=9-9(b-7)

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Solution for =9-9(b-7) equation:


Simplifying
0 = 9 + -9(b + -7)

Reorder the terms:
0 = 9 + -9(-7 + b)
0 = 9 + (-7 * -9 + b * -9)
0 = 9 + (63 + -9b)

Combine like terms: 9 + 63 = 72
0 = 72 + -9b

Solving
0 = 72 + -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.
0 + 9b = 72 + -9b + 9b
Remove the zero:
9b = 72 + -9b + 9b

Combine like terms: -9b + 9b = 0
9b = 72 + 0
9b = 72

Divide each side by '9'.
b = 8

Simplifying
b = 8

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