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Simplifying 9x + 7 = 3(3x + 2) + 1 Reorder the terms: 7 + 9x = 3(3x + 2) + 1 Reorder the terms: 7 + 9x = 3(2 + 3x) + 1 7 + 9x = (2 * 3 + 3x * 3) + 1 7 + 9x = (6 + 9x) + 1 Reorder the terms: 7 + 9x = 6 + 1 + 9x Combine like terms: 6 + 1 = 7 7 + 9x = 7 + 9x Add '-7' to each side of the equation. 7 + -7 + 9x = 7 + -7 + 9x Combine like terms: 7 + -7 = 0 0 + 9x = 7 + -7 + 9x 9x = 7 + -7 + 9x Combine like terms: 7 + -7 = 0 9x = 0 + 9x 9x = 9x Add '-9x' to each side of the equation. 9x + -9x = 9x + -9x Combine like terms: 9x + -9x = 0 0 = 9x + -9x Combine like terms: 9x + -9x = 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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