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Simplifying 3 + -3(x + -3(x + -3(x + -3))) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) Reorder the terms: 3 + -3(x + -3(x + -3(-3 + x))) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) 3 + -3(x + -3(x + (-3 * -3 + x * -3))) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) 3 + -3(x + -3(x + (9 + -3x))) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) Reorder the terms: 3 + -3(x + -3(9 + x + -3x)) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) Combine like terms: x + -3x = -2x 3 + -3(x + -3(9 + -2x)) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) 3 + -3(x + (9 * -3 + -2x * -3)) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) 3 + -3(x + (-27 + 6x)) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) Reorder the terms: 3 + -3(-27 + x + 6x) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) Combine like terms: x + 6x = 7x 3 + -3(-27 + 7x) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) 3 + (-27 * -3 + 7x * -3) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) 3 + (81 + -21x) = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) Combine like terms: 3 + 81 = 84 84 + -21x = 3 + -1(x + -3 + -1(x + -3 + -1(x + -3))) Reorder the terms: 84 + -21x = 3 + -1(x + -3 + -1(x + -3 + -1(-3 + x))) 84 + -21x = 3 + -1(x + -3 + -1(x + -3 + (-3 * -1 + x * -1))) 84 + -21x = 3 + -1(x + -3 + -1(x + -3 + (3 + -1x))) Reorder the terms: 84 + -21x = 3 + -1(x + -3 + -1(-3 + 3 + x + -1x)) Combine like terms: -3 + 3 = 0 84 + -21x = 3 + -1(x + -3 + -1(0 + x + -1x)) 84 + -21x = 3 + -1(x + -3 + -1(x + -1x)) Combine like terms: x + -1x = 0 84 + -21x = 3 + -1(x + -3 + -1(0)) Multiply -1 * 0 84 + -21x = 3 + -1(x + -3 + 0) Anything times zero is zero. 84 + -21x = 3 + -1(x + -3 + 0) Reorder the terms: 84 + -21x = 3 + -1(-3 + 0 + x) Combine like terms: -3 + 0 = -3 84 + -21x = 3 + -1(-3 + x) 84 + -21x = 3 + (-3 * -1 + x * -1) 84 + -21x = 3 + (3 + -1x) Combine like terms: 3 + 3 = 6 84 + -21x = 6 + -1x Solving 84 + -21x = 6 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. 84 + -21x + x = 6 + -1x + x Combine like terms: -21x + x = -20x 84 + -20x = 6 + -1x + x Combine like terms: -1x + x = 0 84 + -20x = 6 + 0 84 + -20x = 6 Add '-84' to each side of the equation. 84 + -84 + -20x = 6 + -84 Combine like terms: 84 + -84 = 0 0 + -20x = 6 + -84 -20x = 6 + -84 Combine like terms: 6 + -84 = -78 -20x = -78 Divide each side by '-20'. x = 3.9 Simplifying x = 3.9
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