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Simplifying 5 = -4a + -21 Reorder the terms: 5 = -21 + -4a Solving 5 = -21 + -4a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4a' to each side of the equation. 5 + 4a = -21 + -4a + 4a Combine like terms: -4a + 4a = 0 5 + 4a = -21 + 0 5 + 4a = -21 Add '-5' to each side of the equation. 5 + -5 + 4a = -21 + -5 Combine like terms: 5 + -5 = 0 0 + 4a = -21 + -5 4a = -21 + -5 Combine like terms: -21 + -5 = -26 4a = -26 Divide each side by '4'. a = -6.5 Simplifying a = -6.5
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