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Simplifying 81 + -2a + -10 = 2a + -2 Reorder the terms: 81 + -10 + -2a = 2a + -2 Combine like terms: 81 + -10 = 71 71 + -2a = 2a + -2 Reorder the terms: 71 + -2a = -2 + 2a Solving 71 + -2a = -2 + 2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2a' to each side of the equation. 71 + -2a + -2a = -2 + 2a + -2a Combine like terms: -2a + -2a = -4a 71 + -4a = -2 + 2a + -2a Combine like terms: 2a + -2a = 0 71 + -4a = -2 + 0 71 + -4a = -2 Add '-71' to each side of the equation. 71 + -71 + -4a = -2 + -71 Combine like terms: 71 + -71 = 0 0 + -4a = -2 + -71 -4a = -2 + -71 Combine like terms: -2 + -71 = -73 -4a = -73 Divide each side by '-4'. a = 18.25 Simplifying a = 18.25
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