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Simplifying -4 + -8(a + b) = -28 + 4a -4 + (a * -8 + b * -8) = -28 + 4a -4 + (-8a + -8b) = -28 + 4a Solving -4 + -8a + -8b = -28 + 4a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4a' to each side of the equation. -4 + -8a + -4a + -8b = -28 + 4a + -4a Combine like terms: -8a + -4a = -12a -4 + -12a + -8b = -28 + 4a + -4a Combine like terms: 4a + -4a = 0 -4 + -12a + -8b = -28 + 0 -4 + -12a + -8b = -28 Add '4' to each side of the equation. -4 + -12a + 4 + -8b = -28 + 4 Reorder the terms: -4 + 4 + -12a + -8b = -28 + 4 Combine like terms: -4 + 4 = 0 0 + -12a + -8b = -28 + 4 -12a + -8b = -28 + 4 Combine like terms: -28 + 4 = -24 -12a + -8b = -24 Add '8b' to each side of the equation. -12a + -8b + 8b = -24 + 8b Combine like terms: -8b + 8b = 0 -12a + 0 = -24 + 8b -12a = -24 + 8b Divide each side by '-12'. a = 2 + -0.6666666667b Simplifying a = 2 + -0.6666666667b
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