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Simplifying 2x + 8 + 5x + y = 90 Reorder the terms: 8 + 2x + 5x + y = 90 Combine like terms: 2x + 5x = 7x 8 + 7x + y = 90 Solving 8 + 7x + y = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + 7x + -8 + y = 90 + -8 Reorder the terms: 8 + -8 + 7x + y = 90 + -8 Combine like terms: 8 + -8 = 0 0 + 7x + y = 90 + -8 7x + y = 90 + -8 Combine like terms: 90 + -8 = 82 7x + y = 82 Add '-1y' to each side of the equation. 7x + y + -1y = 82 + -1y Combine like terms: y + -1y = 0 7x + 0 = 82 + -1y 7x = 82 + -1y Divide each side by '7'. x = 11.71428571 + -0.1428571429y Simplifying x = 11.71428571 + -0.1428571429y
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