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Simplifying -1(7x + -7) + -2(7x + 2) = -39 Reorder the terms: -1(-7 + 7x) + -2(7x + 2) = -39 (-7 * -1 + 7x * -1) + -2(7x + 2) = -39 (7 + -7x) + -2(7x + 2) = -39 Reorder the terms: 7 + -7x + -2(2 + 7x) = -39 7 + -7x + (2 * -2 + 7x * -2) = -39 7 + -7x + (-4 + -14x) = -39 Reorder the terms: 7 + -4 + -7x + -14x = -39 Combine like terms: 7 + -4 = 3 3 + -7x + -14x = -39 Combine like terms: -7x + -14x = -21x 3 + -21x = -39 Solving 3 + -21x = -39 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 + -21x = -39 + -3 Combine like terms: 3 + -3 = 0 0 + -21x = -39 + -3 -21x = -39 + -3 Combine like terms: -39 + -3 = -42 -21x = -42 Divide each side by '-21'. x = 2 Simplifying x = 2
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