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Simplifying 5(2z + -6) + 10(3 + -1z) = 0 Reorder the terms: 5(-6 + 2z) + 10(3 + -1z) = 0 (-6 * 5 + 2z * 5) + 10(3 + -1z) = 0 (-30 + 10z) + 10(3 + -1z) = 0 -30 + 10z + (3 * 10 + -1z * 10) = 0 -30 + 10z + (30 + -10z) = 0 Reorder the terms: -30 + 30 + 10z + -10z = 0 Combine like terms: -30 + 30 = 0 0 + 10z + -10z = 0 10z + -10z = 0 Combine like terms: 10z + -10z = 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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