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Simplifying 49r + 28s + 21 = 0 Reorder the terms: 21 + 49r + 28s = 0 Solving 21 + 49r + 28s = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + 49r + -21 + 28s = 0 + -21 Reorder the terms: 21 + -21 + 49r + 28s = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 49r + 28s = 0 + -21 49r + 28s = 0 + -21 Combine like terms: 0 + -21 = -21 49r + 28s = -21 Add '-28s' to each side of the equation. 49r + 28s + -28s = -21 + -28s Combine like terms: 28s + -28s = 0 49r + 0 = -21 + -28s 49r = -21 + -28s Divide each side by '49'. r = -0.4285714286 + -0.5714285714s Simplifying r = -0.4285714286 + -0.5714285714s
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