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Simplifying f(-9) = 1.5(-9) + -4.2 Reorder the terms for easier multiplication: -9f = 1.5(-9) + -4.2 Multiply 1.5 * -9 -9f = -13.5 + -4.2 Combine like terms: -13.5 + -4.2 = -17.7 -9f = -17.7 Solving -9f = -17.7 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by '-9'. f = 1.966666667 Simplifying f = 1.966666667
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