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Simplifying 0.8k + 7 = -0.7k Reorder the terms: 7 + 0.8k = -0.7k Solving 7 + 0.8k = -0.7k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.7k' to each side of the equation. 7 + 0.8k + 0.7k = -0.7k + 0.7k Combine like terms: 0.8k + 0.7k = 1.5k 7 + 1.5k = -0.7k + 0.7k Combine like terms: -0.7k + 0.7k = 0.0 7 + 1.5k = 0.0 Add '-7' to each side of the equation. 7 + -7 + 1.5k = 0.0 + -7 Combine like terms: 7 + -7 = 0 0 + 1.5k = 0.0 + -7 1.5k = 0.0 + -7 Combine like terms: 0.0 + -7 = -7 1.5k = -7 Divide each side by '1.5'. k = -4.666666667 Simplifying k = -4.666666667
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