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Simplifying 4x + -7 + 12 = 20 Reorder the terms: -7 + 12 + 4x = 20 Combine like terms: -7 + 12 = 5 5 + 4x = 20 Solving 5 + 4x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 4x = 20 + -5 Combine like terms: 5 + -5 = 0 0 + 4x = 20 + -5 4x = 20 + -5 Combine like terms: 20 + -5 = 15 4x = 15 Divide each side by '4'. x = 3.75 Simplifying x = 3.75
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