7(7a)(-7)=

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Solution for 7(7a)(-7)= equation: 


Simplifying
7(7a)(-7) = 0

Remove parenthesis around (7a)
7 * 7a(-7) = 0

Reorder the terms for easier multiplication:
7 * 7 * -7a = 0

Multiply 7 * 7
49 * -7a = 0

Multiply 49 * -7
-343a = 0

Solving
-343a = 0

Solving for variable 'a'.

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

Divide each side by '-343'.
a = 0

Simplifying
a = 0

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