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Simplifying x2 + y2 + z2 = 7(x + y + z) x2 + y2 + z2 = (x * 7 + y * 7 + z * 7) x2 + y2 + z2 = (7x + 7y + 7z) Solving x2 + y2 + z2 = 7x + 7y + 7z Solving for variable 'x'. Reorder the terms: -7x + x2 + -7y + y2 + -7z + z2 = 7x + 7y + 7z + -7x + -7y + -7z Reorder the terms: -7x + x2 + -7y + y2 + -7z + z2 = 7x + -7x + 7y + -7y + 7z + -7z Combine like terms: 7x + -7x = 0 -7x + x2 + -7y + y2 + -7z + z2 = 0 + 7y + -7y + 7z + -7z -7x + x2 + -7y + y2 + -7z + z2 = 7y + -7y + 7z + -7z Combine like terms: 7y + -7y = 0 -7x + x2 + -7y + y2 + -7z + z2 = 0 + 7z + -7z -7x + x2 + -7y + y2 + -7z + z2 = 7z + -7z Combine like terms: 7z + -7z = 0 -7x + x2 + -7y + y2 + -7z + z2 = 0 The solution to this equation could not be determined.
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