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Simplifying 4 + 7a = 7(a + -1) Reorder the terms: 4 + 7a = 7(-1 + a) 4 + 7a = (-1 * 7 + a * 7) 4 + 7a = (-7 + 7a) Add '-7a' to each side of the equation. 4 + 7a + -7a = -7 + 7a + -7a Combine like terms: 7a + -7a = 0 4 + 0 = -7 + 7a + -7a 4 = -7 + 7a + -7a Combine like terms: 7a + -7a = 0 4 = -7 + 0 4 = -7 Solving 4 = -7 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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