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Simplifying 4 * 21 * 15x = 1260x Multiply 4 * 21 84 * 15x = 1260x Multiply 84 * 15 1260x = 1260x Add '-1260x' to each side of the equation. 1260x + -1260x = 1260x + -1260x Combine like terms: 1260x + -1260x = 0 0 = 1260x + -1260x Combine like terms: 1260x + -1260x = 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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