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Simplifying 957 = 75 + 21k Solving 957 = 75 + 21k Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-21k' to each side of the equation. 957 + -21k = 75 + 21k + -21k Combine like terms: 21k + -21k = 0 957 + -21k = 75 + 0 957 + -21k = 75 Add '-957' to each side of the equation. 957 + -957 + -21k = 75 + -957 Combine like terms: 957 + -957 = 0 0 + -21k = 75 + -957 -21k = 75 + -957 Combine like terms: 75 + -957 = -882 -21k = -882 Divide each side by '-21'. k = 42 Simplifying k = 42
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