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Simplifying (1x + 8 * 1x + -2) + (1x + 3 * 1x + 5) = 123 Multiply 8 * 1 (1x + 8x + -2) + (1x + 3 * 1x + 5) = 123 Reorder the terms: (-2 + 1x + 8x) + (1x + 3 * 1x + 5) = 123 Combine like terms: 1x + 8x = 9x (-2 + 9x) + (1x + 3 * 1x + 5) = 123 Remove parenthesis around (-2 + 9x) -2 + 9x + (1x + 3 * 1x + 5) = 123 Multiply 3 * 1 -2 + 9x + (1x + 3x + 5) = 123 Reorder the terms: -2 + 9x + (5 + 1x + 3x) = 123 Combine like terms: 1x + 3x = 4x -2 + 9x + (5 + 4x) = 123 Remove parenthesis around (5 + 4x) -2 + 9x + 5 + 4x = 123 Reorder the terms: -2 + 5 + 9x + 4x = 123 Combine like terms: -2 + 5 = 3 3 + 9x + 4x = 123 Combine like terms: 9x + 4x = 13x 3 + 13x = 123 Solving 3 + 13x = 123 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 13x = 123 + -3 Combine like terms: 3 + -3 = 0 0 + 13x = 123 + -3 13x = 123 + -3 Combine like terms: 123 + -3 = 120 13x = 120 Divide each side by '13'. x = 9.230769231 Simplifying x = 9.230769231
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