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Simplifying 7 + 4 * 2a + 15 = -13 Multiply 4 * 2 7 + 8a + 15 = -13 Reorder the terms: 7 + 15 + 8a = -13 Combine like terms: 7 + 15 = 22 22 + 8a = -13 Solving 22 + 8a = -13 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-22' to each side of the equation. 22 + -22 + 8a = -13 + -22 Combine like terms: 22 + -22 = 0 0 + 8a = -13 + -22 8a = -13 + -22 Combine like terms: -13 + -22 = -35 8a = -35 Divide each side by '8'. a = -4.375 Simplifying a = -4.375
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