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Simplifying 3a + 15 = 3a + 4 Reorder the terms: 15 + 3a = 3a + 4 Reorder the terms: 15 + 3a = 4 + 3a Add '-3a' to each side of the equation. 15 + 3a + -3a = 4 + 3a + -3a Combine like terms: 3a + -3a = 0 15 + 0 = 4 + 3a + -3a 15 = 4 + 3a + -3a Combine like terms: 3a + -3a = 0 15 = 4 + 0 15 = 4 Solving 15 = 4 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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