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Simplifying 5 + -2a = 20 Solving 5 + -2a = 20 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -2a = 20 + -5 Combine like terms: 5 + -5 = 0 0 + -2a = 20 + -5 -2a = 20 + -5 Combine like terms: 20 + -5 = 15 -2a = 15 Divide each side by '-2'. a = -7.5 Simplifying a = -7.5
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