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Simplifying a + -3 + a = 7 + -3a Reorder the terms: -3 + a + a = 7 + -3a Combine like terms: a + a = 2a -3 + 2a = 7 + -3a Solving -3 + 2a = 7 + -3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3a' to each side of the equation. -3 + 2a + 3a = 7 + -3a + 3a Combine like terms: 2a + 3a = 5a -3 + 5a = 7 + -3a + 3a Combine like terms: -3a + 3a = 0 -3 + 5a = 7 + 0 -3 + 5a = 7 Add '3' to each side of the equation. -3 + 3 + 5a = 7 + 3 Combine like terms: -3 + 3 = 0 0 + 5a = 7 + 3 5a = 7 + 3 Combine like terms: 7 + 3 = 10 5a = 10 Divide each side by '5'. a = 2 Simplifying a = 2
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