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Simplifying 13x + -7(2x + -13) = 3(-2x + 9) Reorder the terms: 13x + -7(-13 + 2x) = 3(-2x + 9) 13x + (-13 * -7 + 2x * -7) = 3(-2x + 9) 13x + (91 + -14x) = 3(-2x + 9) Reorder the terms: 91 + 13x + -14x = 3(-2x + 9) Combine like terms: 13x + -14x = -1x 91 + -1x = 3(-2x + 9) Reorder the terms: 91 + -1x = 3(9 + -2x) 91 + -1x = (9 * 3 + -2x * 3) 91 + -1x = (27 + -6x) Solving 91 + -1x = 27 + -6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6x' to each side of the equation. 91 + -1x + 6x = 27 + -6x + 6x Combine like terms: -1x + 6x = 5x 91 + 5x = 27 + -6x + 6x Combine like terms: -6x + 6x = 0 91 + 5x = 27 + 0 91 + 5x = 27 Add '-91' to each side of the equation. 91 + -91 + 5x = 27 + -91 Combine like terms: 91 + -91 = 0 0 + 5x = 27 + -91 5x = 27 + -91 Combine like terms: 27 + -91 = -64 5x = -64 Divide each side by '5'. x = -12.8 Simplifying x = -12.8
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