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Simplifying 7x2 + kx + 7 = 0 Reorder the terms: 7 + kx + 7x2 = 0 Solving 7 + kx + 7x2 = 0 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + kx + -7 + 7x2 = 0 + -7 Reorder the terms: 7 + -7 + kx + 7x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + kx + 7x2 = 0 + -7 kx + 7x2 = 0 + -7 Combine like terms: 0 + -7 = -7 kx + 7x2 = -7 Add '-7x2' to each side of the equation. kx + 7x2 + -7x2 = -7 + -7x2 Combine like terms: 7x2 + -7x2 = 0 kx + 0 = -7 + -7x2 kx = -7 + -7x2 Divide each side by 'x'. k = -7x-1 + -7x Simplifying k = -7x-1 + -7x
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