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Simplifying 2(6z + -1) + -3(z + 2) = 7(z + 1) Reorder the terms: 2(-1 + 6z) + -3(z + 2) = 7(z + 1) (-1 * 2 + 6z * 2) + -3(z + 2) = 7(z + 1) (-2 + 12z) + -3(z + 2) = 7(z + 1) Reorder the terms: -2 + 12z + -3(2 + z) = 7(z + 1) -2 + 12z + (2 * -3 + z * -3) = 7(z + 1) -2 + 12z + (-6 + -3z) = 7(z + 1) Reorder the terms: -2 + -6 + 12z + -3z = 7(z + 1) Combine like terms: -2 + -6 = -8 -8 + 12z + -3z = 7(z + 1) Combine like terms: 12z + -3z = 9z -8 + 9z = 7(z + 1) Reorder the terms: -8 + 9z = 7(1 + z) -8 + 9z = (1 * 7 + z * 7) -8 + 9z = (7 + 7z) Solving -8 + 9z = 7 + 7z Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-7z' to each side of the equation. -8 + 9z + -7z = 7 + 7z + -7z Combine like terms: 9z + -7z = 2z -8 + 2z = 7 + 7z + -7z Combine like terms: 7z + -7z = 0 -8 + 2z = 7 + 0 -8 + 2z = 7 Add '8' to each side of the equation. -8 + 8 + 2z = 7 + 8 Combine like terms: -8 + 8 = 0 0 + 2z = 7 + 8 2z = 7 + 8 Combine like terms: 7 + 8 = 15 2z = 15 Divide each side by '2'. z = 7.5 Simplifying z = 7.5
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