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Simplifying 4(x + -9) = 4(x + 7) Reorder the terms: 4(-9 + x) = 4(x + 7) (-9 * 4 + x * 4) = 4(x + 7) (-36 + 4x) = 4(x + 7) Reorder the terms: -36 + 4x = 4(7 + x) -36 + 4x = (7 * 4 + x * 4) -36 + 4x = (28 + 4x) Add '-4x' to each side of the equation. -36 + 4x + -4x = 28 + 4x + -4x Combine like terms: 4x + -4x = 0 -36 + 0 = 28 + 4x + -4x -36 = 28 + 4x + -4x Combine like terms: 4x + -4x = 0 -36 = 28 + 0 -36 = 28 Solving -36 = 28 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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