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Simplifying -13 + 5x = 2(7x + 39) Reorder the terms: -13 + 5x = 2(39 + 7x) -13 + 5x = (39 * 2 + 7x * 2) -13 + 5x = (78 + 14x) Solving -13 + 5x = 78 + 14x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-14x' to each side of the equation. -13 + 5x + -14x = 78 + 14x + -14x Combine like terms: 5x + -14x = -9x -13 + -9x = 78 + 14x + -14x Combine like terms: 14x + -14x = 0 -13 + -9x = 78 + 0 -13 + -9x = 78 Add '13' to each side of the equation. -13 + 13 + -9x = 78 + 13 Combine like terms: -13 + 13 = 0 0 + -9x = 78 + 13 -9x = 78 + 13 Combine like terms: 78 + 13 = 91 -9x = 91 Divide each side by '-9'. x = -10.11111111 Simplifying x = -10.11111111
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