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Simplifying 7x + 20 = 4x + -1 Reorder the terms: 20 + 7x = 4x + -1 Reorder the terms: 20 + 7x = -1 + 4x Solving 20 + 7x = -1 + 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. 20 + 7x + -4x = -1 + 4x + -4x Combine like terms: 7x + -4x = 3x 20 + 3x = -1 + 4x + -4x Combine like terms: 4x + -4x = 0 20 + 3x = -1 + 0 20 + 3x = -1 Add '-20' to each side of the equation. 20 + -20 + 3x = -1 + -20 Combine like terms: 20 + -20 = 0 0 + 3x = -1 + -20 3x = -1 + -20 Combine like terms: -1 + -20 = -21 3x = -21 Divide each side by '3'. x = -7 Simplifying x = -7
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