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Simplifying -7a2 + 2d + 9 = 0 Reorder the terms: 9 + -7a2 + 2d = 0 Solving 9 + -7a2 + 2d = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -7a2 + -9 + 2d = 0 + -9 Reorder the terms: 9 + -9 + -7a2 + 2d = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -7a2 + 2d = 0 + -9 -7a2 + 2d = 0 + -9 Combine like terms: 0 + -9 = -9 -7a2 + 2d = -9 Add '-2d' to each side of the equation. -7a2 + 2d + -2d = -9 + -2d Combine like terms: 2d + -2d = 0 -7a2 + 0 = -9 + -2d -7a2 = -9 + -2d Divide each side by '-7'. a2 = 1.285714286 + 0.2857142857d Simplifying a2 = 1.285714286 + 0.2857142857d Reorder the terms: -1.285714286 + a2 + -0.2857142857d = 1.285714286 + 0.2857142857d + -1.285714286 + -0.2857142857d Reorder the terms: -1.285714286 + a2 + -0.2857142857d = 1.285714286 + -1.285714286 + 0.2857142857d + -0.2857142857d Combine like terms: 1.285714286 + -1.285714286 = 0.000000000 -1.285714286 + a2 + -0.2857142857d = 0.000000000 + 0.2857142857d + -0.2857142857d -1.285714286 + a2 + -0.2857142857d = 0.2857142857d + -0.2857142857d Combine like terms: 0.2857142857d + -0.2857142857d = 0.0000000000 -1.285714286 + a2 + -0.2857142857d = 0.0000000000 The solution to this equation could not be determined.
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