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Simplifying 7 = 3a + 20 Reorder the terms: 7 = 20 + 3a Solving 7 = 20 + 3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3a' to each side of the equation. 7 + -3a = 20 + 3a + -3a Combine like terms: 3a + -3a = 0 7 + -3a = 20 + 0 7 + -3a = 20 Add '-7' to each side of the equation. 7 + -7 + -3a = 20 + -7 Combine like terms: 7 + -7 = 0 0 + -3a = 20 + -7 -3a = 20 + -7 Combine like terms: 20 + -7 = 13 -3a = 13 Divide each side by '-3'. a = -4.333333333 Simplifying a = -4.333333333
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