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Simplifying 2x + 2(4x + 15) = 90 Reorder the terms: 2x + 2(15 + 4x) = 90 2x + (15 * 2 + 4x * 2) = 90 2x + (30 + 8x) = 90 Reorder the terms: 30 + 2x + 8x = 90 Combine like terms: 2x + 8x = 10x 30 + 10x = 90 Solving 30 + 10x = 90 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 + 10x = 90 + -30 Combine like terms: 30 + -30 = 0 0 + 10x = 90 + -30 10x = 90 + -30 Combine like terms: 90 + -30 = 60 10x = 60 Divide each side by '10'. x = 6 Simplifying x = 6
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