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Simplifying 6.4r + -7 + -2.9r = 3.5 Reorder the terms: -7 + 6.4r + -2.9r = 3.5 Combine like terms: 6.4r + -2.9r = 3.5r -7 + 3.5r = 3.5 Solving -7 + 3.5r = 3.5 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 3.5r = 3.5 + 7 Combine like terms: -7 + 7 = 0 0 + 3.5r = 3.5 + 7 3.5r = 3.5 + 7 Combine like terms: 3.5 + 7 = 10.5 3.5r = 10.5 Divide each side by '3.5'. r = 3 Simplifying r = 3
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