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Simplifying 7 + -19 = -2z Combine like terms: 7 + -19 = -12 -12 = -2z Solving -12 = -2z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '2z' to each side of the equation. -12 + 2z = -2z + 2z Combine like terms: -2z + 2z = 0 -12 + 2z = 0 Add '12' to each side of the equation. -12 + 12 + 2z = 0 + 12 Combine like terms: -12 + 12 = 0 0 + 2z = 0 + 12 2z = 0 + 12 Combine like terms: 0 + 12 = 12 2z = 12 Divide each side by '2'. z = 6 Simplifying z = 6
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