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Simplifying 25a + -15 = 4a Reorder the terms: -15 + 25a = 4a Solving -15 + 25a = 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. -15 + 25a + -4a = 4a + -4a Combine like terms: 25a + -4a = 21a -15 + 21a = 4a + -4a Combine like terms: 4a + -4a = 0 -15 + 21a = 0 Add '15' to each side of the equation. -15 + 15 + 21a = 0 + 15 Combine like terms: -15 + 15 = 0 0 + 21a = 0 + 15 21a = 0 + 15 Combine like terms: 0 + 15 = 15 21a = 15 Divide each side by '21'. a = 0.7142857143 Simplifying a = 0.7142857143
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