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Simplifying 4 = 7x + -3(2x + -4) Reorder the terms: 4 = 7x + -3(-4 + 2x) 4 = 7x + (-4 * -3 + 2x * -3) 4 = 7x + (12 + -6x) Reorder the terms: 4 = 12 + 7x + -6x Combine like terms: 7x + -6x = 1x 4 = 12 + 1x Solving 4 = 12 + 1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 4 + -1x = 12 + 1x + -1x Combine like terms: 1x + -1x = 0 4 + -1x = 12 + 0 4 + -1x = 12 Add '-4' to each side of the equation. 4 + -4 + -1x = 12 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 12 + -4 -1x = 12 + -4 Combine like terms: 12 + -4 = 8 -1x = 8 Divide each side by '-1'. x = -8 Simplifying x = -8
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