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Simplifying 40 + 2x + 8 = 90 Reorder the terms: 40 + 8 + 2x = 90 Combine like terms: 40 + 8 = 48 48 + 2x = 90 Solving 48 + 2x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-48' to each side of the equation. 48 + -48 + 2x = 90 + -48 Combine like terms: 48 + -48 = 0 0 + 2x = 90 + -48 2x = 90 + -48 Combine like terms: 90 + -48 = 42 2x = 42 Divide each side by '2'. x = 21 Simplifying x = 21
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