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Simplifying -5x + 7x + -9 = 2(x + -4) + -40 Reorder the terms: -9 + -5x + 7x = 2(x + -4) + -40 Combine like terms: -5x + 7x = 2x -9 + 2x = 2(x + -4) + -40 Reorder the terms: -9 + 2x = 2(-4 + x) + -40 -9 + 2x = (-4 * 2 + x * 2) + -40 -9 + 2x = (-8 + 2x) + -40 Reorder the terms: -9 + 2x = -8 + -40 + 2x Combine like terms: -8 + -40 = -48 -9 + 2x = -48 + 2x Add '-2x' to each side of the equation. -9 + 2x + -2x = -48 + 2x + -2x Combine like terms: 2x + -2x = 0 -9 + 0 = -48 + 2x + -2x -9 = -48 + 2x + -2x Combine like terms: 2x + -2x = 0 -9 = -48 + 0 -9 = -48 Solving -9 = -48 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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