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Simplifying 7(x + 2(x + -1)) = 3x Reorder the terms: 7(x + 2(-1 + x)) = 3x 7(x + (-1 * 2 + x * 2)) = 3x 7(x + (-2 + 2x)) = 3x Reorder the terms: 7(-2 + x + 2x) = 3x Combine like terms: x + 2x = 3x 7(-2 + 3x) = 3x (-2 * 7 + 3x * 7) = 3x (-14 + 21x) = 3x Solving -14 + 21x = 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. -14 + 21x + -3x = 3x + -3x Combine like terms: 21x + -3x = 18x -14 + 18x = 3x + -3x Combine like terms: 3x + -3x = 0 -14 + 18x = 0 Add '14' to each side of the equation. -14 + 14 + 18x = 0 + 14 Combine like terms: -14 + 14 = 0 0 + 18x = 0 + 14 18x = 0 + 14 Combine like terms: 0 + 14 = 14 18x = 14 Divide each side by '18'. x = 0.7777777778 Simplifying x = 0.7777777778
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