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Simplifying a + -4 = 4a + -20 Reorder the terms: -4 + a = 4a + -20 Reorder the terms: -4 + a = -20 + 4a Solving -4 + a = -20 + 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. -4 + a + -4a = -20 + 4a + -4a Combine like terms: a + -4a = -3a -4 + -3a = -20 + 4a + -4a Combine like terms: 4a + -4a = 0 -4 + -3a = -20 + 0 -4 + -3a = -20 Add '4' to each side of the equation. -4 + 4 + -3a = -20 + 4 Combine like terms: -4 + 4 = 0 0 + -3a = -20 + 4 -3a = -20 + 4 Combine like terms: -20 + 4 = -16 -3a = -16 Divide each side by '-3'. a = 5.333333333 Simplifying a = 5.333333333
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