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Simplifying x * 12 + -135 = x * 4 + -7 Reorder the terms for easier multiplication: 12x + -135 = x * 4 + -7 Reorder the terms: -135 + 12x = x * 4 + -7 Reorder the terms for easier multiplication: -135 + 12x = 4x + -7 Reorder the terms: -135 + 12x = -7 + 4x Solving -135 + 12x = -7 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. -135 + 12x + -4x = -7 + 4x + -4x Combine like terms: 12x + -4x = 8x -135 + 8x = -7 + 4x + -4x Combine like terms: 4x + -4x = 0 -135 + 8x = -7 + 0 -135 + 8x = -7 Add '135' to each side of the equation. -135 + 135 + 8x = -7 + 135 Combine like terms: -135 + 135 = 0 0 + 8x = -7 + 135 8x = -7 + 135 Combine like terms: -7 + 135 = 128 8x = 128 Divide each side by '8'. x = 16 Simplifying x = 16
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