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Simplifying 7x + -1(-13 + 3x) * 12 = 13 Reorder the terms for easier multiplication: 7x + -1 * 12(-13 + 3x) = 13 Multiply -1 * 12 7x + -12(-13 + 3x) = 13 7x + (-13 * -12 + 3x * -12) = 13 7x + (156 + -36x) = 13 Reorder the terms: 156 + 7x + -36x = 13 Combine like terms: 7x + -36x = -29x 156 + -29x = 13 Solving 156 + -29x = 13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-156' to each side of the equation. 156 + -156 + -29x = 13 + -156 Combine like terms: 156 + -156 = 0 0 + -29x = 13 + -156 -29x = 13 + -156 Combine like terms: 13 + -156 = -143 -29x = -143 Divide each side by '-29'. x = 4.931034483 Simplifying x = 4.931034483

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