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Simplifying 7(3x + 5) = (x + -9) Reorder the terms: 7(5 + 3x) = (x + -9) (5 * 7 + 3x * 7) = (x + -9) (35 + 21x) = (x + -9) Reorder the terms: 35 + 21x = (-9 + x) Remove parenthesis around (-9 + x) 35 + 21x = -9 + x Solving 35 + 21x = -9 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 35 + 21x + -1x = -9 + x + -1x Combine like terms: 21x + -1x = 20x 35 + 20x = -9 + x + -1x Combine like terms: x + -1x = 0 35 + 20x = -9 + 0 35 + 20x = -9 Add '-35' to each side of the equation. 35 + -35 + 20x = -9 + -35 Combine like terms: 35 + -35 = 0 0 + 20x = -9 + -35 20x = -9 + -35 Combine like terms: -9 + -35 = -44 20x = -44 Divide each side by '20'. x = -2.2 Simplifying x = -2.2
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