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Simplifying r + -4 = 3.4 Reorder the terms: -4 + r = 3.4 Solving -4 + r = 3.4 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + r = 3.4 + 4 Combine like terms: -4 + 4 = 0 0 + r = 3.4 + 4 r = 3.4 + 4 Combine like terms: 3.4 + 4 = 7.4 r = 7.4 Simplifying r = 7.4
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