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Simplifying 27x + -7 + -18x = 3(3x + -3) + 2 Reorder the terms: -7 + 27x + -18x = 3(3x + -3) + 2 Combine like terms: 27x + -18x = 9x -7 + 9x = 3(3x + -3) + 2 Reorder the terms: -7 + 9x = 3(-3 + 3x) + 2 -7 + 9x = (-3 * 3 + 3x * 3) + 2 -7 + 9x = (-9 + 9x) + 2 Reorder the terms: -7 + 9x = -9 + 2 + 9x Combine like terms: -9 + 2 = -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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