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Simplifying 3 + -4a = -1a + -18 Reorder the terms: 3 + -4a = -18 + -1a Solving 3 + -4a = -18 + -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. 3 + -4a + a = -18 + -1a + a Combine like terms: -4a + a = -3a 3 + -3a = -18 + -1a + a Combine like terms: -1a + a = 0 3 + -3a = -18 + 0 3 + -3a = -18 Add '-3' to each side of the equation. 3 + -3 + -3a = -18 + -3 Combine like terms: 3 + -3 = 0 0 + -3a = -18 + -3 -3a = -18 + -3 Combine like terms: -18 + -3 = -21 -3a = -21 Divide each side by '-3'. a = 7 Simplifying a = 7
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