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Simplifying 8r2 + 7 = 5r2 + 4 Reorder the terms: 7 + 8r2 = 5r2 + 4 Reorder the terms: 7 + 8r2 = 4 + 5r2 Solving 7 + 8r2 = 4 + 5r2 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r2' to each side of the equation. 7 + 8r2 + -5r2 = 4 + 5r2 + -5r2 Combine like terms: 8r2 + -5r2 = 3r2 7 + 3r2 = 4 + 5r2 + -5r2 Combine like terms: 5r2 + -5r2 = 0 7 + 3r2 = 4 + 0 7 + 3r2 = 4 Add '-7' to each side of the equation. 7 + -7 + 3r2 = 4 + -7 Combine like terms: 7 + -7 = 0 0 + 3r2 = 4 + -7 3r2 = 4 + -7 Combine like terms: 4 + -7 = -3 3r2 = -3 Divide each side by '3'. r2 = -1 Simplifying r2 = -1 Reorder the terms: 1 + r2 = -1 + 1 Combine like terms: -1 + 1 = 0 1 + r2 = 0 The solution to this equation could not be determined.
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