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Simplifying -3 + 7(x + -4) = 15x + 3 + -8x Reorder the terms: -3 + 7(-4 + x) = 15x + 3 + -8x -3 + (-4 * 7 + x * 7) = 15x + 3 + -8x -3 + (-28 + 7x) = 15x + 3 + -8x Combine like terms: -3 + -28 = -31 -31 + 7x = 15x + 3 + -8x Reorder the terms: -31 + 7x = 3 + 15x + -8x Combine like terms: 15x + -8x = 7x -31 + 7x = 3 + 7x Add '-7x' to each side of the equation. -31 + 7x + -7x = 3 + 7x + -7x Combine like terms: 7x + -7x = 0 -31 + 0 = 3 + 7x + -7x -31 = 3 + 7x + -7x Combine like terms: 7x + -7x = 0 -31 = 3 + 0 -31 = 3 Solving -31 = 3 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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