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Simplifying A2 + -21a + 90 = 0 Reorder the terms: 90 + A2 + -21a = 0 Solving 90 + A2 + -21a = 0 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '-90' to each side of the equation. 90 + A2 + -90 + -21a = 0 + -90 Reorder the terms: 90 + -90 + A2 + -21a = 0 + -90 Combine like terms: 90 + -90 = 0 0 + A2 + -21a = 0 + -90 A2 + -21a = 0 + -90 Combine like terms: 0 + -90 = -90 A2 + -21a = -90 Add '21a' to each side of the equation. A2 + -21a + 21a = -90 + 21a Combine like terms: -21a + 21a = 0 A2 + 0 = -90 + 21a A2 = -90 + 21a Simplifying A2 = -90 + 21a Reorder the terms: 90 + A2 + -21a = -90 + 21a + 90 + -21a Reorder the terms: 90 + A2 + -21a = -90 + 90 + 21a + -21a Combine like terms: -90 + 90 = 0 90 + A2 + -21a = 0 + 21a + -21a 90 + A2 + -21a = 21a + -21a Combine like terms: 21a + -21a = 0 90 + A2 + -21a = 0 The solution to this equation could not be determined.
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