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Simplifying 4a + -28 = 0 Reorder the terms: -28 + 4a = 0 Solving -28 + 4a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + 4a = 0 + 28 Combine like terms: -28 + 28 = 0 0 + 4a = 0 + 28 4a = 0 + 28 Combine like terms: 0 + 28 = 28 4a = 28 Divide each side by '4'. a = 7 Simplifying a = 7
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