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Simplifying 21 + -8k = 7k Solving 21 + -8k = 7k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-7k' to each side of the equation. 21 + -8k + -7k = 7k + -7k Combine like terms: -8k + -7k = -15k 21 + -15k = 7k + -7k Combine like terms: 7k + -7k = 0 21 + -15k = 0 Add '-21' to each side of the equation. 21 + -21 + -15k = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -15k = 0 + -21 -15k = 0 + -21 Combine like terms: 0 + -21 = -21 -15k = -21 Divide each side by '-15'. k = 1.4 Simplifying k = 1.4
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