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Simplifying 7x + -3 + -4x = 3(x + 2) + -9 Reorder the terms: -3 + 7x + -4x = 3(x + 2) + -9 Combine like terms: 7x + -4x = 3x -3 + 3x = 3(x + 2) + -9 Reorder the terms: -3 + 3x = 3(2 + x) + -9 -3 + 3x = (2 * 3 + x * 3) + -9 -3 + 3x = (6 + 3x) + -9 Reorder the terms: -3 + 3x = 6 + -9 + 3x Combine like terms: 6 + -9 = -3 -3 + 3x = -3 + 3x Add '3' to each side of the equation. -3 + 3 + 3x = -3 + 3 + 3x Combine like terms: -3 + 3 = 0 0 + 3x = -3 + 3 + 3x 3x = -3 + 3 + 3x Combine like terms: -3 + 3 = 0 3x = 0 + 3x 3x = 3x Add '-3x' to each side of the equation. 3x + -3x = 3x + -3x Combine like terms: 3x + -3x = 0 0 = 3x + -3x Combine like terms: 3x + -3x = 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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