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Simplifying -20 + x = 8 + -3x Solving -20 + x = 8 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. -20 + x + 3x = 8 + -3x + 3x Combine like terms: x + 3x = 4x -20 + 4x = 8 + -3x + 3x Combine like terms: -3x + 3x = 0 -20 + 4x = 8 + 0 -20 + 4x = 8 Add '20' to each side of the equation. -20 + 20 + 4x = 8 + 20 Combine like terms: -20 + 20 = 0 0 + 4x = 8 + 20 4x = 8 + 20 Combine like terms: 8 + 20 = 28 4x = 28 Divide each side by '4'. x = 7 Simplifying x = 7
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