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Simplifying -7(2x + 1) + -13 = 42 Reorder the terms: -7(1 + 2x) + -13 = 42 (1 * -7 + 2x * -7) + -13 = 42 (-7 + -14x) + -13 = 42 Reorder the terms: -7 + -13 + -14x = 42 Combine like terms: -7 + -13 = -20 -20 + -14x = 42 Solving -20 + -14x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -14x = 42 + 20 Combine like terms: -20 + 20 = 0 0 + -14x = 42 + 20 -14x = 42 + 20 Combine like terms: 42 + 20 = 62 -14x = 62 Divide each side by '-14'. x = -4.428571429 Simplifying x = -4.428571429
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