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Simplifying a + 2b + 4c + 8d = 4 Solving a + 2b + 4c + 8d = 4 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2b' to each side of the equation. a + 2b + 4c + -2b + 8d = 4 + -2b Reorder the terms: a + 2b + -2b + 4c + 8d = 4 + -2b Combine like terms: 2b + -2b = 0 a + 0 + 4c + 8d = 4 + -2b a + 4c + 8d = 4 + -2b Add '-4c' to each side of the equation. a + 4c + -4c + 8d = 4 + -2b + -4c Combine like terms: 4c + -4c = 0 a + 0 + 8d = 4 + -2b + -4c a + 8d = 4 + -2b + -4c Add '-8d' to each side of the equation. a + 8d + -8d = 4 + -2b + -4c + -8d Combine like terms: 8d + -8d = 0 a + 0 = 4 + -2b + -4c + -8d a = 4 + -2b + -4c + -8d Simplifying a = 4 + -2b + -4c + -8d
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