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Simplifying 3(x + 7) = -18(x + 1) Reorder the terms: 3(7 + x) = -18(x + 1) (7 * 3 + x * 3) = -18(x + 1) (21 + 3x) = -18(x + 1) Reorder the terms: 21 + 3x = -18(1 + x) 21 + 3x = (1 * -18 + x * -18) 21 + 3x = (-18 + -18x) Solving 21 + 3x = -18 + -18x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18x' to each side of the equation. 21 + 3x + 18x = -18 + -18x + 18x Combine like terms: 3x + 18x = 21x 21 + 21x = -18 + -18x + 18x Combine like terms: -18x + 18x = 0 21 + 21x = -18 + 0 21 + 21x = -18 Add '-21' to each side of the equation. 21 + -21 + 21x = -18 + -21 Combine like terms: 21 + -21 = 0 0 + 21x = -18 + -21 21x = -18 + -21 Combine like terms: -18 + -21 = -39 21x = -39 Divide each side by '21'. x = -1.857142857 Simplifying x = -1.857142857
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