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Simplifying 21x2 + 56X + 7 = 0 Reorder the terms: 7 + 56X + 21x2 = 0 Solving 7 + 56X + 21x2 = 0 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + 56X + -7 + 21x2 = 0 + -7 Reorder the terms: 7 + -7 + 56X + 21x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 56X + 21x2 = 0 + -7 56X + 21x2 = 0 + -7 Combine like terms: 0 + -7 = -7 56X + 21x2 = -7 Add '-21x2' to each side of the equation. 56X + 21x2 + -21x2 = -7 + -21x2 Combine like terms: 21x2 + -21x2 = 0 56X + 0 = -7 + -21x2 56X = -7 + -21x2 Divide each side by '56'. X = -0.125 + -0.375x2 Simplifying X = -0.125 + -0.375x2
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