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Simplifying -7(a + 3) = -2(a + 3) + -5a Reorder the terms: -7(3 + a) = -2(a + 3) + -5a (3 * -7 + a * -7) = -2(a + 3) + -5a (-21 + -7a) = -2(a + 3) + -5a Reorder the terms: -21 + -7a = -2(3 + a) + -5a -21 + -7a = (3 * -2 + a * -2) + -5a -21 + -7a = (-6 + -2a) + -5a Combine like terms: -2a + -5a = -7a -21 + -7a = -6 + -7a Add '7a' to each side of the equation. -21 + -7a + 7a = -6 + -7a + 7a Combine like terms: -7a + 7a = 0 -21 + 0 = -6 + -7a + 7a -21 = -6 + -7a + 7a Combine like terms: -7a + 7a = 0 -21 = -6 + 0 -21 = -6 Solving -21 = -6 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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