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Simplifying -7 + 10z + 2.1 + -7z = 0 Reorder the terms: -7 + 2.1 + 10z + -7z = 0 Combine like terms: -7 + 2.1 = -4.9 -4.9 + 10z + -7z = 0 Combine like terms: 10z + -7z = 3z -4.9 + 3z = 0 Solving -4.9 + 3z = 0 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '4.9' to each side of the equation. -4.9 + 4.9 + 3z = 0 + 4.9 Combine like terms: -4.9 + 4.9 = 0.0 0.0 + 3z = 0 + 4.9 3z = 0 + 4.9 Combine like terms: 0 + 4.9 = 4.9 3z = 4.9 Divide each side by '3'. z = 1.633333333 Simplifying z = 1.633333333
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