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Simplifying 7a + 1 + -3a = -4 Reorder the terms: 1 + 7a + -3a = -4 Combine like terms: 7a + -3a = 4a 1 + 4a = -4 Solving 1 + 4a = -4 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 4a = -4 + -1 Combine like terms: 1 + -1 = 0 0 + 4a = -4 + -1 4a = -4 + -1 Combine like terms: -4 + -1 = -5 4a = -5 Divide each side by '4'. a = -1.25 Simplifying a = -1.25
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