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Simplifying -9(-16 + -1f) = (1 + -3f) (-16 * -9 + -1f * -9) = (1 + -3f) (144 + 9f) = (1 + -3f) Remove parenthesis around (1 + -3f) 144 + 9f = 1 + -3f Solving 144 + 9f = 1 + -3f Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '3f' to each side of the equation. 144 + 9f + 3f = 1 + -3f + 3f Combine like terms: 9f + 3f = 12f 144 + 12f = 1 + -3f + 3f Combine like terms: -3f + 3f = 0 144 + 12f = 1 + 0 144 + 12f = 1 Add '-144' to each side of the equation. 144 + -144 + 12f = 1 + -144 Combine like terms: 144 + -144 = 0 0 + 12f = 1 + -144 12f = 1 + -144 Combine like terms: 1 + -144 = -143 12f = -143 Divide each side by '12'. f = -11.91666667 Simplifying f = -11.91666667
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