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Simplifying 0.7 + 0.4r = -0.3r Solving 0.7 + 0.4r = -0.3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '0.3r' to each side of the equation. 0.7 + 0.4r + 0.3r = -0.3r + 0.3r Combine like terms: 0.4r + 0.3r = 0.7r 0.7 + 0.7r = -0.3r + 0.3r Combine like terms: -0.3r + 0.3r = 0.0 0.7 + 0.7r = 0.0 Add '-0.7' to each side of the equation. 0.7 + -0.7 + 0.7r = 0.0 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + 0.7r = 0.0 + -0.7 0.7r = 0.0 + -0.7 Combine like terms: 0.0 + -0.7 = -0.7 0.7r = -0.7 Divide each side by '0.7'. r = -1 Simplifying r = -1
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