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Simplifying -7(2x + 1) = -77 Reorder the terms: -7(1 + 2x) = -77 (1 * -7 + 2x * -7) = -77 (-7 + -14x) = -77 Solving -7 + -14x = -77 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -14x = -77 + 7 Combine like terms: -7 + 7 = 0 0 + -14x = -77 + 7 -14x = -77 + 7 Combine like terms: -77 + 7 = -70 -14x = -70 Divide each side by '-14'. x = 5 Simplifying x = 5
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