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Simplifying 7(x + 4) + -9 = 3x + 4(4 + x) Reorder the terms: 7(4 + x) + -9 = 3x + 4(4 + x) (4 * 7 + x * 7) + -9 = 3x + 4(4 + x) (28 + 7x) + -9 = 3x + 4(4 + x) Reorder the terms: 28 + -9 + 7x = 3x + 4(4 + x) Combine like terms: 28 + -9 = 19 19 + 7x = 3x + 4(4 + x) 19 + 7x = 3x + (4 * 4 + x * 4) 19 + 7x = 3x + (16 + 4x) Reorder the terms: 19 + 7x = 16 + 3x + 4x Combine like terms: 3x + 4x = 7x 19 + 7x = 16 + 7x Add '-7x' to each side of the equation. 19 + 7x + -7x = 16 + 7x + -7x Combine like terms: 7x + -7x = 0 19 + 0 = 16 + 7x + -7x 19 = 16 + 7x + -7x Combine like terms: 7x + -7x = 0 19 = 16 + 0 19 = 16 Solving 19 = 16 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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