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Simplifying x2 + 7a + -18 = 0 Reorder the terms: -18 + 7a + x2 = 0 Solving -18 + 7a + x2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 7a + 18 + x2 = 0 + 18 Reorder the terms: -18 + 18 + 7a + x2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 7a + x2 = 0 + 18 7a + x2 = 0 + 18 Combine like terms: 0 + 18 = 18 7a + x2 = 18 Add '-1x2' to each side of the equation. 7a + x2 + -1x2 = 18 + -1x2 Combine like terms: x2 + -1x2 = 0 7a + 0 = 18 + -1x2 7a = 18 + -1x2 Divide each side by '7'. a = 2.571428571 + -0.1428571429x2 Simplifying a = 2.571428571 + -0.1428571429x2
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