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Simplifying 30 + -15x = -15x + 30 Reorder the terms: 30 + -15x = 30 + -15x Add '-30' to each side of the equation. 30 + -30 + -15x = 30 + -30 + -15x Combine like terms: 30 + -30 = 0 0 + -15x = 30 + -30 + -15x -15x = 30 + -30 + -15x Combine like terms: 30 + -30 = 0 -15x = 0 + -15x -15x = -15x Add '15x' to each side of the equation. -15x + 15x = -15x + 15x Combine like terms: -15x + 15x = 0 0 = -15x + 15x Combine like terms: -15x + 15x = 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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