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Simplifying 30 = 7(x + 4) Reorder the terms: 30 = 7(4 + x) 30 = (4 * 7 + x * 7) 30 = (28 + 7x) Solving 30 = 28 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 30 + -7x = 28 + 7x + -7x Combine like terms: 7x + -7x = 0 30 + -7x = 28 + 0 30 + -7x = 28 Add '-30' to each side of the equation. 30 + -30 + -7x = 28 + -30 Combine like terms: 30 + -30 = 0 0 + -7x = 28 + -30 -7x = 28 + -30 Combine like terms: 28 + -30 = -2 -7x = -2 Divide each side by '-7'. x = 0.2857142857 Simplifying x = 0.2857142857
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