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Simplifying (8x + 42) = 90 Reorder the terms: (42 + 8x) = 90 Remove parenthesis around (42 + 8x) 42 + 8x = 90 Solving 42 + 8x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 8x = 90 + -42 Combine like terms: 42 + -42 = 0 0 + 8x = 90 + -42 8x = 90 + -42 Combine like terms: 90 + -42 = 48 8x = 48 Divide each side by '8'. x = 6 Simplifying x = 6
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