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Simplifying 4x + 2(x + 15) = 72 Reorder the terms: 4x + 2(15 + x) = 72 4x + (15 * 2 + x * 2) = 72 4x + (30 + 2x) = 72 Reorder the terms: 30 + 4x + 2x = 72 Combine like terms: 4x + 2x = 6x 30 + 6x = 72 Solving 30 + 6x = 72 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + 6x = 72 + -30 Combine like terms: 30 + -30 = 0 0 + 6x = 72 + -30 6x = 72 + -30 Combine like terms: 72 + -30 = 42 6x = 42 Divide each side by '6'. x = 7 Simplifying x = 7
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