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Simplifying 18 = 3(4a + -8) Reorder the terms: 18 = 3(-8 + 4a) 18 = (-8 * 3 + 4a * 3) 18 = (-24 + 12a) Solving 18 = -24 + 12a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-12a' to each side of the equation. 18 + -12a = -24 + 12a + -12a Combine like terms: 12a + -12a = 0 18 + -12a = -24 + 0 18 + -12a = -24 Add '-18' to each side of the equation. 18 + -18 + -12a = -24 + -18 Combine like terms: 18 + -18 = 0 0 + -12a = -24 + -18 -12a = -24 + -18 Combine like terms: -24 + -18 = -42 -12a = -42 Divide each side by '-12'. a = 3.5 Simplifying a = 3.5
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