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Simplifying 64 + r2 = r2 + 2r + 1 Reorder the terms: 64 + r2 = 1 + 2r + r2 Add '-1r2' to each side of the equation. 64 + r2 + -1r2 = 1 + 2r + r2 + -1r2 Combine like terms: r2 + -1r2 = 0 64 + 0 = 1 + 2r + r2 + -1r2 64 = 1 + 2r + r2 + -1r2 Combine like terms: r2 + -1r2 = 0 64 = 1 + 2r + 0 64 = 1 + 2r Solving 64 = 1 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 64 + -2r = 1 + 2r + -2r Combine like terms: 2r + -2r = 0 64 + -2r = 1 + 0 64 + -2r = 1 Add '-64' to each side of the equation. 64 + -64 + -2r = 1 + -64 Combine like terms: 64 + -64 = 0 0 + -2r = 1 + -64 -2r = 1 + -64 Combine like terms: 1 + -64 = -63 -2r = -63 Divide each side by '-2'. r = 31.5 Simplifying r = 31.5
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