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Simplifying 7x2 + r = 320 Reorder the terms: r + 7x2 = 320 Solving r + 7x2 = 320 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7x2' to each side of the equation. r + 7x2 + -7x2 = 320 + -7x2 Combine like terms: 7x2 + -7x2 = 0 r + 0 = 320 + -7x2 r = 320 + -7x2 Simplifying r = 320 + -7x2
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