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Simplifying 11 + -2(a + -1) = 4a Reorder the terms: 11 + -2(-1 + a) = 4a 11 + (-1 * -2 + a * -2) = 4a 11 + (2 + -2a) = 4a Combine like terms: 11 + 2 = 13 13 + -2a = 4a Solving 13 + -2a = 4a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-4a' to each side of the equation. 13 + -2a + -4a = 4a + -4a Combine like terms: -2a + -4a = -6a 13 + -6a = 4a + -4a Combine like terms: 4a + -4a = 0 13 + -6a = 0 Add '-13' to each side of the equation. 13 + -13 + -6a = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -6a = 0 + -13 -6a = 0 + -13 Combine like terms: 0 + -13 = -13 -6a = -13 Divide each side by '-6'. a = 2.166666667 Simplifying a = 2.166666667
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