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Simplifying 4(x + 4) + 9 = 4x + 7 Reorder the terms: 4(4 + x) + 9 = 4x + 7 (4 * 4 + x * 4) + 9 = 4x + 7 (16 + 4x) + 9 = 4x + 7 Reorder the terms: 16 + 9 + 4x = 4x + 7 Combine like terms: 16 + 9 = 25 25 + 4x = 4x + 7 Reorder the terms: 25 + 4x = 7 + 4x Add '-4x' to each side of the equation. 25 + 4x + -4x = 7 + 4x + -4x Combine like terms: 4x + -4x = 0 25 + 0 = 7 + 4x + -4x 25 = 7 + 4x + -4x Combine like terms: 4x + -4x = 0 25 = 7 + 0 25 = 7 Solving 25 = 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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