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Simplifying 2x + 21 + 3x + -4 = 90 Reorder the terms: 21 + -4 + 2x + 3x = 90 Combine like terms: 21 + -4 = 17 17 + 2x + 3x = 90 Combine like terms: 2x + 3x = 5x 17 + 5x = 90 Solving 17 + 5x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-17' to each side of the equation. 17 + -17 + 5x = 90 + -17 Combine like terms: 17 + -17 = 0 0 + 5x = 90 + -17 5x = 90 + -17 Combine like terms: 90 + -17 = 73 5x = 73 Divide each side by '5'. x = 14.6 Simplifying x = 14.6
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