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Simplifying 4(2a + -1) + -7a = 9 + -5 Reorder the terms: 4(-1 + 2a) + -7a = 9 + -5 (-1 * 4 + 2a * 4) + -7a = 9 + -5 (-4 + 8a) + -7a = 9 + -5 Combine like terms: 8a + -7a = 1a -4 + 1a = 9 + -5 Combine like terms: 9 + -5 = 4 -4 + 1a = 4 Solving -4 + 1a = 4 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 1a = 4 + 4 Combine like terms: -4 + 4 = 0 0 + 1a = 4 + 4 1a = 4 + 4 Combine like terms: 4 + 4 = 8 1a = 8 Divide each side by '1'. a = 8 Simplifying a = 8
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