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