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Simplifying 84 = 4x + 4(2x + -3) Reorder the terms: 84 = 4x + 4(-3 + 2x) 84 = 4x + (-3 * 4 + 2x * 4) 84 = 4x + (-12 + 8x) Reorder the terms: 84 = -12 + 4x + 8x Combine like terms: 4x + 8x = 12x 84 = -12 + 12x Solving 84 = -12 + 12x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12x' to each side of the equation. 84 + -12x = -12 + 12x + -12x Combine like terms: 12x + -12x = 0 84 + -12x = -12 + 0 84 + -12x = -12 Add '-84' to each side of the equation. 84 + -84 + -12x = -12 + -84 Combine like terms: 84 + -84 = 0 0 + -12x = -12 + -84 -12x = -12 + -84 Combine like terms: -12 + -84 = -96 -12x = -96 Divide each side by '-12'. x = 8 Simplifying x = 8
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