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Simplifying 7(4 + x) = 20 (4 * 7 + x * 7) = 20 (28 + 7x) = 20 Solving 28 + 7x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 7x = 20 + -28 Combine like terms: 28 + -28 = 0 0 + 7x = 20 + -28 7x = 20 + -28 Combine like terms: 20 + -28 = -8 7x = -8 Divide each side by '7'. x = -1.142857143 Simplifying x = -1.142857143
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