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