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Simplifying 5(25.8 + -0.2y + -1.6z) + 1y + 8z = 129 (25.8 * 5 + -0.2y * 5 + -1.6z * 5) + 1y + 8z = 129 (129 + -1y + -8z) + 1y + 8z = 129 Reorder the terms: 129 + -1y + 1y + -8z + 8z = 129 Combine like terms: -1y + 1y = 0 129 + 0 + -8z + 8z = 129 129 + -8z + 8z = 129 Combine like terms: -8z + 8z = 0 129 + 0 = 129 129 = 129 Add '-129' to each side of the equation. 129 + -129 = 129 + -129 Combine like terms: 129 + -129 = 0 0 = 129 + -129 Combine like terms: 129 + -129 = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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