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Simplifying 1 + 2(a + -3) = 4a Reorder the terms: 1 + 2(-3 + a) = 4a 1 + (-3 * 2 + a * 2) = 4a 1 + (-6 + 2a) = 4a Combine like terms: 1 + -6 = -5 -5 + 2a = 4a Solving -5 + 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. -5 + 2a + -4a = 4a + -4a Combine like terms: 2a + -4a = -2a -5 + -2a = 4a + -4a Combine like terms: 4a + -4a = 0 -5 + -2a = 0 Add '5' to each side of the equation. -5 + 5 + -2a = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -2a = 0 + 5 -2a = 0 + 5 Combine like terms: 0 + 5 = 5 -2a = 5 Divide each side by '-2'. a = -2.5 Simplifying a = -2.5
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