9=a(-4+1)(-4+7)

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Solution for 9=a(-4+1)(-4+7) equation:


Simplifying
9 = a(-4 + 1)(-4 + 7)

Combine like terms: -4 + 1 = -3
9 = a(-3)(-4 + 7)

Combine like terms: -4 + 7 = 3
9 = a * -3(3)

Reorder the terms for easier multiplication:
9 = -3 * 3a

Multiply -3 * 3
9 = -9a

Solving
9 = -9a

Solving for variable 'a'.

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

Add '9a' to each side of the equation.
9 + 9a = -9a + 9a

Combine like terms: -9a + 9a = 0
9 + 9a = 0

Add '-9' to each side of the equation.
9 + -9 + 9a = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 9a = 0 + -9
9a = 0 + -9

Combine like terms: 0 + -9 = -9
9a = -9

Divide each side by '9'.
a = -1

Simplifying
a = -1

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