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Simplifying
16z2 + -9z2 = 0
Combine like terms: 16z2 + -9z2 = 7z2
7z2 = 0
Solving
7z2 = 0
Solving for variable 'z'.
Move all terms containing z to the left, all other terms to the right.
Divide each side by '7'.
z2 = 0
Simplifying
z2 = 0
Take the square root of each side:
z = {0}
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