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Simplifying 7 + -2z = 15 Solving 7 + -2z = 15 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 = 15 + -7 Combine like terms: 7 + -7 = 0 0 + -2z = 15 + -7 -2z = 15 + -7 Combine like terms: 15 + -7 = 8 -2z = 8 Divide each side by '-2'. z = -4 Simplifying z = -4
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