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Mathematics for IGCSE & O level - Equations (Section 3 - No. 48)
Solve: 20x - 3(x - 4) = 30 - x
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Expand the brackets: 20x - 3x + 12 = 30 - x. Simplify: 17x + 12 = 30 - x. Combine like terms: 18x = 18. Divide by 18: x = 1.
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