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Simplifying -4(a + -7) + 2a + -28 = -4 Reorder the terms: -4(-7 + a) + 2a + -28 = -4 (-7 * -4 + a * -4) + 2a + -28 = -4 (28 + -4a) + 2a + -28 = -4 Reorder the terms: 28 + -28 + -4a + 2a = -4 Combine like terms: 28 + -28 = 0 0 + -4a + 2a = -4 -4a + 2a = -4 Combine like terms: -4a + 2a = -2a -2a = -4 Solving -2a = -4 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Divide each side by '-2'. a = 2 Simplifying a = 2
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