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Simplifying 5r + 30 = 2x + 90 Reorder the terms: 30 + 5r = 2x + 90 Reorder the terms: 30 + 5r = 90 + 2x Solving 30 + 5r = 90 + 2x Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + 5r = 90 + -30 + 2x Combine like terms: 30 + -30 = 0 0 + 5r = 90 + -30 + 2x 5r = 90 + -30 + 2x Combine like terms: 90 + -30 = 60 5r = 60 + 2x Divide each side by '5'. r = 12 + 0.4x Simplifying r = 12 + 0.4x
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