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Simplifying 4z + 7 + -6z = 13 Reorder the terms: 7 + 4z + -6z = 13 Combine like terms: 4z + -6z = -2z 7 + -2z = 13 Solving 7 + -2z = 13 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2z = 13 + -7 Combine like terms: 7 + -7 = 0 0 + -2z = 13 + -7 -2z = 13 + -7 Combine like terms: 13 + -7 = 6 -2z = 6 Divide each side by '-2'. z = -3 Simplifying z = -3
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