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Simplifying -1a + 4 = a Reorder the terms: 4 + -1a = a Solving 4 + -1a = a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. 4 + -1a + -1a = a + -1a Combine like terms: -1a + -1a = -2a 4 + -2a = a + -1a Combine like terms: a + -1a = 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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