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