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Simplifying 3(2x + -7) = -6x + -21 Reorder the terms: 3(-7 + 2x) = -6x + -21 (-7 * 3 + 2x * 3) = -6x + -21 (-21 + 6x) = -6x + -21 Reorder the terms: -21 + 6x = -21 + -6x Add '21' to each side of the equation. -21 + 21 + 6x = -21 + 21 + -6x Combine like terms: -21 + 21 = 0 0 + 6x = -21 + 21 + -6x 6x = -21 + 21 + -6x Combine like terms: -21 + 21 = 0 6x = 0 + -6x 6x = -6x Solving 6x = -6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6x' to each side of the equation. 6x + 6x = -6x + 6x Combine like terms: 6x + 6x = 12x 12x = -6x + 6x Combine like terms: -6x + 6x = 0 12x = 0 Divide each side by '12'. x = 0 Simplifying x = 0
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