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Simplifying 25 + -7a = 28 + 4a Solving 25 + -7a = 28 + 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. 25 + -7a + -4a = 28 + 4a + -4a Combine like terms: -7a + -4a = -11a 25 + -11a = 28 + 4a + -4a Combine like terms: 4a + -4a = 0 25 + -11a = 28 + 0 25 + -11a = 28 Add '-25' to each side of the equation. 25 + -25 + -11a = 28 + -25 Combine like terms: 25 + -25 = 0 0 + -11a = 28 + -25 -11a = 28 + -25 Combine like terms: 28 + -25 = 3 -11a = 3 Divide each side by '-11'. a = -0.2727272727 Simplifying a = -0.2727272727
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