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Simplifying -7x + -9 = -3x + -4(x + 1) Reorder the terms: -9 + -7x = -3x + -4(x + 1) Reorder the terms: -9 + -7x = -3x + -4(1 + x) -9 + -7x = -3x + (1 * -4 + x * -4) -9 + -7x = -3x + (-4 + -4x) Reorder the terms: -9 + -7x = -4 + -3x + -4x Combine like terms: -3x + -4x = -7x -9 + -7x = -4 + -7x Add '7x' to each side of the equation. -9 + -7x + 7x = -4 + -7x + 7x Combine like terms: -7x + 7x = 0 -9 + 0 = -4 + -7x + 7x -9 = -4 + -7x + 7x Combine like terms: -7x + 7x = 0 -9 = -4 + 0 -9 = -4 Solving -9 = -4 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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