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Simplifying 7(4x + -1) = 7(4x + 9) Reorder the terms: 7(-1 + 4x) = 7(4x + 9) (-1 * 7 + 4x * 7) = 7(4x + 9) (-7 + 28x) = 7(4x + 9) Reorder the terms: -7 + 28x = 7(9 + 4x) -7 + 28x = (9 * 7 + 4x * 7) -7 + 28x = (63 + 28x) Add '-28x' to each side of the equation. -7 + 28x + -28x = 63 + 28x + -28x Combine like terms: 28x + -28x = 0 -7 + 0 = 63 + 28x + -28x -7 = 63 + 28x + -28x Combine like terms: 28x + -28x = 0 -7 = 63 + 0 -7 = 63 Solving -7 = 63 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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