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Simplifying 25 + -7a = 18 + -4a Solving 25 + -7a = 18 + -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 = 18 + -4a + 4a Combine like terms: -7a + 4a = -3a 25 + -3a = 18 + -4a + 4a Combine like terms: -4a + 4a = 0 25 + -3a = 18 + 0 25 + -3a = 18 Add '-25' to each side of the equation. 25 + -25 + -3a = 18 + -25 Combine like terms: 25 + -25 = 0 0 + -3a = 18 + -25 -3a = 18 + -25 Combine like terms: 18 + -25 = -7 -3a = -7 Divide each side by '-3'. a = 2.333333333 Simplifying a = 2.333333333
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