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Simplifying 3.9 + -2.22r = 16.864 Solving 3.9 + -2.22r = 16.864 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3.9' to each side of the equation. 3.9 + -3.9 + -2.22r = 16.864 + -3.9 Combine like terms: 3.9 + -3.9 = 0.0 0.0 + -2.22r = 16.864 + -3.9 -2.22r = 16.864 + -3.9 Combine like terms: 16.864 + -3.9 = 12.964 -2.22r = 12.964 Divide each side by '-2.22'. r = -5.83963964 Simplifying r = -5.83963964
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