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Simplifying -4a + 7 = -7 + -20 Reorder the terms: 7 + -4a = -7 + -20 Combine like terms: -7 + -20 = -27 7 + -4a = -27 Solving 7 + -4a = -27 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -4a = -27 + -7 Combine like terms: 7 + -7 = 0 0 + -4a = -27 + -7 -4a = -27 + -7 Combine like terms: -27 + -7 = -34 -4a = -34 Divide each side by '-4'. a = 8.5 Simplifying a = 8.5
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