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Simplifying -81a + -90b + -108 = 398 Reorder the terms: -108 + -81a + -90b = 398 Solving -108 + -81a + -90b = 398 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '108' to each side of the equation. -108 + -81a + 108 + -90b = 398 + 108 Reorder the terms: -108 + 108 + -81a + -90b = 398 + 108 Combine like terms: -108 + 108 = 0 0 + -81a + -90b = 398 + 108 -81a + -90b = 398 + 108 Combine like terms: 398 + 108 = 506 -81a + -90b = 506 Add '90b' to each side of the equation. -81a + -90b + 90b = 506 + 90b Combine like terms: -90b + 90b = 0 -81a + 0 = 506 + 90b -81a = 506 + 90b Divide each side by '-81'. a = -6.24691358 + -1.111111111b Simplifying a = -6.24691358 + -1.111111111b
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