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Simplifying 20x + 7 = 5x + -4 * 2 Reorder the terms: 7 + 20x = 5x + -4 * 2 Multiply -4 * 2 7 + 20x = 5x + -8 Reorder the terms: 7 + 20x = -8 + 5x Solving 7 + 20x = -8 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. 7 + 20x + -5x = -8 + 5x + -5x Combine like terms: 20x + -5x = 15x 7 + 15x = -8 + 5x + -5x Combine like terms: 5x + -5x = 0 7 + 15x = -8 + 0 7 + 15x = -8 Add '-7' to each side of the equation. 7 + -7 + 15x = -8 + -7 Combine like terms: 7 + -7 = 0 0 + 15x = -8 + -7 15x = -8 + -7 Combine like terms: -8 + -7 = -15 15x = -15 Divide each side by '15'. x = -1 Simplifying x = -1
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