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Simplifying 5 + -2(a + 2) = 7 + 2 Reorder the terms: 5 + -2(2 + a) = 7 + 2 5 + (2 * -2 + a * -2) = 7 + 2 5 + (-4 + -2a) = 7 + 2 Combine like terms: 5 + -4 = 1 1 + -2a = 7 + 2 Combine like terms: 7 + 2 = 9 1 + -2a = 9 Solving 1 + -2a = 9 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -2a = 9 + -1 Combine like terms: 1 + -1 = 0 0 + -2a = 9 + -1 -2a = 9 + -1 Combine like terms: 9 + -1 = 8 -2a = 8 Divide each side by '-2'. a = -4 Simplifying a = -4
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