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Simplifying (8x + -23) + (x + -2x) = 90 Reorder the terms: (-23 + 8x) + (x + -2x) = 90 Remove parenthesis around (-23 + 8x) -23 + 8x + (x + -2x) = 90 Combine like terms: x + -2x = -1x -23 + 8x + (-1x) = 90 -23 + 8x + (-1x) = 90 Combine like terms: 8x + (-1x) = 7x -23 + 7x = 90 Solving -23 + 7x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '23' to each side of the equation. -23 + 23 + 7x = 90 + 23 Combine like terms: -23 + 23 = 0 0 + 7x = 90 + 23 7x = 90 + 23 Combine like terms: 90 + 23 = 113 7x = 113 Divide each side by '7'. x = 16.14285714 Simplifying x = 16.14285714
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