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Simplifying 7a + -1 = 2a + 4 Reorder the terms: -1 + 7a = 2a + 4 Reorder the terms: -1 + 7a = 4 + 2a Solving -1 + 7a = 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. -1 + 7a + -2a = 4 + 2a + -2a Combine like terms: 7a + -2a = 5a -1 + 5a = 4 + 2a + -2a Combine like terms: 2a + -2a = 0 -1 + 5a = 4 + 0 -1 + 5a = 4 Add '1' to each side of the equation. -1 + 1 + 5a = 4 + 1 Combine like terms: -1 + 1 = 0 0 + 5a = 4 + 1 5a = 4 + 1 Combine like terms: 4 + 1 = 5 5a = 5 Divide each side by '5'. a = 1 Simplifying a = 1
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