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Simplifying 7(x + -4) + 2x = 9(x + 2) + -4 Reorder the terms: 7(-4 + x) + 2x = 9(x + 2) + -4 (-4 * 7 + x * 7) + 2x = 9(x + 2) + -4 (-28 + 7x) + 2x = 9(x + 2) + -4 Combine like terms: 7x + 2x = 9x -28 + 9x = 9(x + 2) + -4 Reorder the terms: -28 + 9x = 9(2 + x) + -4 -28 + 9x = (2 * 9 + x * 9) + -4 -28 + 9x = (18 + 9x) + -4 Reorder the terms: -28 + 9x = 18 + -4 + 9x Combine like terms: 18 + -4 = 14 -28 + 9x = 14 + 9x Add '-9x' to each side of the equation. -28 + 9x + -9x = 14 + 9x + -9x Combine like terms: 9x + -9x = 0 -28 + 0 = 14 + 9x + -9x -28 = 14 + 9x + -9x Combine like terms: 9x + -9x = 0 -28 = 14 + 0 -28 = 14 Solving -28 = 14 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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