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Simplifying 3a + 7 = 7a + -3 Reorder the terms: 7 + 3a = 7a + -3 Reorder the terms: 7 + 3a = -3 + 7a Solving 7 + 3a = -3 + 7a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7a' to each side of the equation. 7 + 3a + -7a = -3 + 7a + -7a Combine like terms: 3a + -7a = -4a 7 + -4a = -3 + 7a + -7a Combine like terms: 7a + -7a = 0 7 + -4a = -3 + 0 7 + -4a = -3 Add '-7' to each side of the equation. 7 + -7 + -4a = -3 + -7 Combine like terms: 7 + -7 = 0 0 + -4a = -3 + -7 -4a = -3 + -7 Combine like terms: -3 + -7 = -10 -4a = -10 Divide each side by '-4'. a = 2.5 Simplifying a = 2.5
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