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Simplifying 7a + 7 = 3a + -13 Reorder the terms: 7 + 7a = 3a + -13 Reorder the terms: 7 + 7a = -13 + 3a Solving 7 + 7a = -13 + 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 + 7a + -3a = -13 + 3a + -3a Combine like terms: 7a + -3a = 4a 7 + 4a = -13 + 3a + -3a Combine like terms: 3a + -3a = 0 7 + 4a = -13 + 0 7 + 4a = -13 Add '-7' to each side of the equation. 7 + -7 + 4a = -13 + -7 Combine like terms: 7 + -7 = 0 0 + 4a = -13 + -7 4a = -13 + -7 Combine like terms: -13 + -7 = -20 4a = -20 Divide each side by '4'. a = -5 Simplifying a = -5
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