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Simplifying 7z + -2 = 19 + 4z Reorder the terms: -2 + 7z = 19 + 4z Solving -2 + 7z = 19 + 4z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-4z' to each side of the equation. -2 + 7z + -4z = 19 + 4z + -4z Combine like terms: 7z + -4z = 3z -2 + 3z = 19 + 4z + -4z Combine like terms: 4z + -4z = 0 -2 + 3z = 19 + 0 -2 + 3z = 19 Add '2' to each side of the equation. -2 + 2 + 3z = 19 + 2 Combine like terms: -2 + 2 = 0 0 + 3z = 19 + 2 3z = 19 + 2 Combine like terms: 19 + 2 = 21 3z = 21 Divide each side by '3'. z = 7 Simplifying z = 7
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