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Simplifying
7a * a = 0
Multiply a * a
7a2 = 0
Solving
7a2 = 0
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Divide each side by '7'.
a2 = 0
Simplifying
a2 = 0
Take the square root of each side:
a = {0}
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