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