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Simplifying 7(x + 2) + -1 = 7x + 13 Reorder the terms: 7(2 + x) + -1 = 7x + 13 (2 * 7 + x * 7) + -1 = 7x + 13 (14 + 7x) + -1 = 7x + 13 Reorder the terms: 14 + -1 + 7x = 7x + 13 Combine like terms: 14 + -1 = 13 13 + 7x = 7x + 13 Reorder the terms: 13 + 7x = 13 + 7x Add '-13' to each side of the equation. 13 + -13 + 7x = 13 + -13 + 7x Combine like terms: 13 + -13 = 0 0 + 7x = 13 + -13 + 7x 7x = 13 + -13 + 7x Combine like terms: 13 + -13 = 0 7x = 0 + 7x 7x = 7x Add '-7x' to each side of the equation. 7x + -7x = 7x + -7x Combine like terms: 7x + -7x = 0 0 = 7x + -7x Combine like terms: 7x + -7x = 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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