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Simplifying 7(x + -4) = -13 + 7x Reorder the terms: 7(-4 + x) = -13 + 7x (-4 * 7 + x * 7) = -13 + 7x (-28 + 7x) = -13 + 7x Add '-7x' to each side of the equation. -28 + 7x + -7x = -13 + 7x + -7x Combine like terms: 7x + -7x = 0 -28 + 0 = -13 + 7x + -7x -28 = -13 + 7x + -7x Combine like terms: 7x + -7x = 0 -28 = -13 + 0 -28 = -13 Solving -28 = -13 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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