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Simplifying 21a + 14 = 7(3a + -4) Reorder the terms: 14 + 21a = 7(3a + -4) Reorder the terms: 14 + 21a = 7(-4 + 3a) 14 + 21a = (-4 * 7 + 3a * 7) 14 + 21a = (-28 + 21a) Add '-21a' to each side of the equation. 14 + 21a + -21a = -28 + 21a + -21a Combine like terms: 21a + -21a = 0 14 + 0 = -28 + 21a + -21a 14 = -28 + 21a + -21a Combine like terms: 21a + -21a = 0 14 = -28 + 0 14 = -28 Solving 14 = -28 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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