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Simplifying 162 = 3(-7a + -2) Reorder the terms: 162 = 3(-2 + -7a) 162 = (-2 * 3 + -7a * 3) 162 = (-6 + -21a) Solving 162 = -6 + -21a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '21a' to each side of the equation. 162 + 21a = -6 + -21a + 21a Combine like terms: -21a + 21a = 0 162 + 21a = -6 + 0 162 + 21a = -6 Add '-162' to each side of the equation. 162 + -162 + 21a = -6 + -162 Combine like terms: 162 + -162 = 0 0 + 21a = -6 + -162 21a = -6 + -162 Combine like terms: -6 + -162 = -168 21a = -168 Divide each side by '21'. a = -8 Simplifying a = -8
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