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Simplifying -4 = 8 + a + 3a Combine like terms: a + 3a = 4a -4 = 8 + 4a Solving -4 = 8 + 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 + -4a = 8 + 4a + -4a Combine like terms: 4a + -4a = 0 -4 + -4a = 8 + 0 -4 + -4a = 8 Add '4' to each side of the equation. -4 + 4 + -4a = 8 + 4 Combine like terms: -4 + 4 = 0 0 + -4a = 8 + 4 -4a = 8 + 4 Combine like terms: 8 + 4 = 12 -4a = 12 Divide each side by '-4'. a = -3 Simplifying a = -3
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