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Simplifying 3x2 + 2a + -90 = 0 Reorder the terms: -90 + 2a + 3x2 = 0 Solving -90 + 2a + 3x2 = 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 + 2a + 90 + 3x2 = 0 + 90 Reorder the terms: -90 + 90 + 2a + 3x2 = 0 + 90 Combine like terms: -90 + 90 = 0 0 + 2a + 3x2 = 0 + 90 2a + 3x2 = 0 + 90 Combine like terms: 0 + 90 = 90 2a + 3x2 = 90 Add '-3x2' to each side of the equation. 2a + 3x2 + -3x2 = 90 + -3x2 Combine like terms: 3x2 + -3x2 = 0 2a + 0 = 90 + -3x2 2a = 90 + -3x2 Divide each side by '2'. a = 45 + -1.5x2 Simplifying a = 45 + -1.5x2
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