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Simplifying 7.85 + -2.8r = -3.3r Solving 7.85 + -2.8r = -3.3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3.3r' to each side of the equation. 7.85 + -2.8r + 3.3r = -3.3r + 3.3r Combine like terms: -2.8r + 3.3r = 0.5r 7.85 + 0.5r = -3.3r + 3.3r Combine like terms: -3.3r + 3.3r = 0.0 7.85 + 0.5r = 0.0 Add '-7.85' to each side of the equation. 7.85 + -7.85 + 0.5r = 0.0 + -7.85 Combine like terms: 7.85 + -7.85 = 0.00 0.00 + 0.5r = 0.0 + -7.85 0.5r = 0.0 + -7.85 Combine like terms: 0.0 + -7.85 = -7.85 0.5r = -7.85 Divide each side by '0.5'. r = -15.7 Simplifying r = -15.7
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