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Simplifying 3(-3x + -7) = 3(-7x + 4) Reorder the terms: 3(-7 + -3x) = 3(-7x + 4) (-7 * 3 + -3x * 3) = 3(-7x + 4) (-21 + -9x) = 3(-7x + 4) Reorder the terms: -21 + -9x = 3(4 + -7x) -21 + -9x = (4 * 3 + -7x * 3) -21 + -9x = (12 + -21x) Solving -21 + -9x = 12 + -21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21x' to each side of the equation. -21 + -9x + 21x = 12 + -21x + 21x Combine like terms: -9x + 21x = 12x -21 + 12x = 12 + -21x + 21x Combine like terms: -21x + 21x = 0 -21 + 12x = 12 + 0 -21 + 12x = 12 Add '21' to each side of the equation. -21 + 21 + 12x = 12 + 21 Combine like terms: -21 + 21 = 0 0 + 12x = 12 + 21 12x = 12 + 21 Combine like terms: 12 + 21 = 33 12x = 33 Divide each side by '12'. x = 2.75 Simplifying x = 2.75
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