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Simplifying 13x + -1(2x + -3) = 91 Reorder the terms: 13x + -1(-3 + 2x) = 91 13x + (-3 * -1 + 2x * -1) = 91 13x + (3 + -2x) = 91 Reorder the terms: 3 + 13x + -2x = 91 Combine like terms: 13x + -2x = 11x 3 + 11x = 91 Solving 3 + 11x = 91 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 + 11x = 91 + -3 Combine like terms: 3 + -3 = 0 0 + 11x = 91 + -3 11x = 91 + -3 Combine like terms: 91 + -3 = 88 11x = 88 Divide each side by '11'. x = 8 Simplifying x = 8
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