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Simplifying 90 + -1(2x + 8) = k Reorder the terms: 90 + -1(8 + 2x) = k 90 + (8 * -1 + 2x * -1) = k 90 + (-8 + -2x) = k Combine like terms: 90 + -8 = 82 82 + -2x = k Solving 82 + -2x = k Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-82' to each side of the equation. 82 + -82 + -2x = -82 + k Combine like terms: 82 + -82 = 0 0 + -2x = -82 + k -2x = -82 + k Divide each side by '-2'. x = 41 + -0.5k Simplifying x = 41 + -0.5k
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