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Simplifying 3(9 + x) + 1 = 7x + -4(x + -2) (9 * 3 + x * 3) + 1 = 7x + -4(x + -2) (27 + 3x) + 1 = 7x + -4(x + -2) Reorder the terms: 27 + 1 + 3x = 7x + -4(x + -2) Combine like terms: 27 + 1 = 28 28 + 3x = 7x + -4(x + -2) Reorder the terms: 28 + 3x = 7x + -4(-2 + x) 28 + 3x = 7x + (-2 * -4 + x * -4) 28 + 3x = 7x + (8 + -4x) Reorder the terms: 28 + 3x = 8 + 7x + -4x Combine like terms: 7x + -4x = 3x 28 + 3x = 8 + 3x Add '-3x' to each side of the equation. 28 + 3x + -3x = 8 + 3x + -3x Combine like terms: 3x + -3x = 0 28 + 0 = 8 + 3x + -3x 28 = 8 + 3x + -3x Combine like terms: 3x + -3x = 0 28 = 8 + 0 28 = 8 Solving 28 = 8 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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