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Simplifying 7z2 + 2z2 + 400 = 0 Reorder the terms: 400 + 7z2 + 2z2 = 0 Combine like terms: 7z2 + 2z2 = 9z2 400 + 9z2 = 0 Solving 400 + 9z2 = 0 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-400' to each side of the equation. 400 + -400 + 9z2 = 0 + -400 Combine like terms: 400 + -400 = 0 0 + 9z2 = 0 + -400 9z2 = 0 + -400 Combine like terms: 0 + -400 = -400 9z2 = -400 Divide each side by '9'. z2 = -44.44444444 Simplifying z2 = -44.44444444 Reorder the terms: 44.44444444 + z2 = -44.44444444 + 44.44444444 Combine like terms: -44.44444444 + 44.44444444 = 0.00000000 44.44444444 + z2 = 0.00000000 The solution to this equation could not be determined.
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