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Simplifying 13 = 5 + 3(7) + -13 Multiply 3 * 7 13 = 5 + 21 + -13 Combine like terms: 5 + 21 = 26 13 = 26 + -13 Combine like terms: 26 + -13 = 13 13 = 13 Add '-13' to each side of the equation. 13 + -13 = 13 + -13 Combine like terms: 13 + -13 = 0 0 = 13 + -13 Combine like terms: 13 + -13 = 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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