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Simplifying 42x + 30 = 30 + 42x Reorder the terms: 30 + 42x = 30 + 42x Add '-30' to each side of the equation. 30 + -30 + 42x = 30 + -30 + 42x Combine like terms: 30 + -30 = 0 0 + 42x = 30 + -30 + 42x 42x = 30 + -30 + 42x Combine like terms: 30 + -30 = 0 42x = 0 + 42x 42x = 42x Add '-42x' to each side of the equation. 42x + -42x = 42x + -42x Combine like terms: 42x + -42x = 0 0 = 42x + -42x Combine like terms: 42x + -42x = 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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