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Simplifying 3x + 2a + -1b = 13 Reorder the terms: 2a + -1b + 3x = 13 Solving 2a + -1b + 3x = 13 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add 'b' to each side of the equation. 2a + -1b + b + 3x = 13 + b Combine like terms: -1b + b = 0 2a + 0 + 3x = 13 + b 2a + 3x = 13 + b Add '-3x' to each side of the equation. 2a + 3x + -3x = 13 + b + -3x Combine like terms: 3x + -3x = 0 2a + 0 = 13 + b + -3x 2a = 13 + b + -3x Divide each side by '2'. a = 6.5 + 0.5b + -1.5x Simplifying a = 6.5 + 0.5b + -1.5x
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