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Simplifying -3(2x + -4) + -3x = -7x Reorder the terms: -3(-4 + 2x) + -3x = -7x (-4 * -3 + 2x * -3) + -3x = -7x (12 + -6x) + -3x = -7x Combine like terms: -6x + -3x = -9x 12 + -9x = -7x Solving 12 + -9x = -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. 12 + -9x + 7x = -7x + 7x Combine like terms: -9x + 7x = -2x 12 + -2x = -7x + 7x Combine like terms: -7x + 7x = 0 12 + -2x = 0 Add '-12' to each side of the equation. 12 + -12 + -2x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -2x = 0 + -12 -2x = 0 + -12 Combine like terms: 0 + -12 = -12 -2x = -12 Divide each side by '-2'. x = 6 Simplifying x = 6
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