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Simplifying 7(x + 2) + 1 = 3x + 15 + 4x Reorder the terms: 7(2 + x) + 1 = 3x + 15 + 4x (2 * 7 + x * 7) + 1 = 3x + 15 + 4x (14 + 7x) + 1 = 3x + 15 + 4x Reorder the terms: 14 + 1 + 7x = 3x + 15 + 4x Combine like terms: 14 + 1 = 15 15 + 7x = 3x + 15 + 4x Reorder the terms: 15 + 7x = 15 + 3x + 4x Combine like terms: 3x + 4x = 7x 15 + 7x = 15 + 7x Add '-15' to each side of the equation. 15 + -15 + 7x = 15 + -15 + 7x Combine like terms: 15 + -15 = 0 0 + 7x = 15 + -15 + 7x 7x = 15 + -15 + 7x Combine like terms: 15 + -15 = 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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