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Simplifying 5x + 2x + 6 = 90 Reorder the terms: 6 + 5x + 2x = 90 Combine like terms: 5x + 2x = 7x 6 + 7x = 90 Solving 6 + 7x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 7x = 90 + -6 Combine like terms: 6 + -6 = 0 0 + 7x = 90 + -6 7x = 90 + -6 Combine like terms: 90 + -6 = 84 7x = 84 Divide each side by '7'. x = 12 Simplifying x = 12
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