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Simplifying 2 + 7(x + 2) = 7x + 13 + 3 Reorder the terms: 2 + 7(2 + x) = 7x + 13 + 3 2 + (2 * 7 + x * 7) = 7x + 13 + 3 2 + (14 + 7x) = 7x + 13 + 3 Combine like terms: 2 + 14 = 16 16 + 7x = 7x + 13 + 3 Reorder the terms: 16 + 7x = 13 + 3 + 7x Combine like terms: 13 + 3 = 16 16 + 7x = 16 + 7x Add '-16' to each side of the equation. 16 + -16 + 7x = 16 + -16 + 7x Combine like terms: 16 + -16 = 0 0 + 7x = 16 + -16 + 7x 7x = 16 + -16 + 7x Combine like terms: 16 + -16 = 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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