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Simplifying -4a + (-2b) + 1 + -4a + -2b = 13 Reorder the terms: 1 + -4a + -4a + (-2b) + -2b = 13 Combine like terms: -4a + -4a = -8a 1 + -8a + (-2b) + -2b = 13 Combine like terms: (-2b) + -2b = -4b 1 + -8a + -4b = 13 Solving 1 + -8a + -4b = 13 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -8a + -1 + -4b = 13 + -1 Reorder the terms: 1 + -1 + -8a + -4b = 13 + -1 Combine like terms: 1 + -1 = 0 0 + -8a + -4b = 13 + -1 -8a + -4b = 13 + -1 Combine like terms: 13 + -1 = 12 -8a + -4b = 12 Add '4b' to each side of the equation. -8a + -4b + 4b = 12 + 4b Combine like terms: -4b + 4b = 0 -8a + 0 = 12 + 4b -8a = 12 + 4b Divide each side by '-8'. a = -1.5 + -0.5b Simplifying a = -1.5 + -0.5b
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