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Simplifying (0.75 + -1c) * 7 = 2.80 Reorder the terms for easier multiplication: 7(0.75 + -1c) = 2.80 (0.75 * 7 + -1c * 7) = 2.80 (5.25 + -7c) = 2.80 Solving 5.25 + -7c = 2.80 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-5.25' to each side of the equation. 5.25 + -5.25 + -7c = 2.80 + -5.25 Combine like terms: 5.25 + -5.25 = 0.00 0.00 + -7c = 2.80 + -5.25 -7c = 2.80 + -5.25 Combine like terms: 2.80 + -5.25 = -2.45 -7c = -2.45 Divide each side by '-7'. c = 0.35 Simplifying c = 0.35
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