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Simplifying 9x2 + -42x + c = 0 Reorder the terms: c + -42x + 9x2 = 0 Solving c + -42x + 9x2 = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '42x' to each side of the equation. c + -42x + 42x + 9x2 = 0 + 42x Combine like terms: -42x + 42x = 0 c + 0 + 9x2 = 0 + 42x c + 9x2 = 0 + 42x Remove the zero: c + 9x2 = 42x Add '-9x2' to each side of the equation. c + 9x2 + -9x2 = 42x + -9x2 Combine like terms: 9x2 + -9x2 = 0 c + 0 = 42x + -9x2 c = 42x + -9x2 Simplifying c = 42x + -9x2
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