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Simplifying 7 + 4a = 9a Solving 7 + 4a = 9a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9a' to each side of the equation. 7 + 4a + -9a = 9a + -9a Combine like terms: 4a + -9a = -5a 7 + -5a = 9a + -9a Combine like terms: 9a + -9a = 0 7 + -5a = 0 Add '-7' to each side of the equation. 7 + -7 + -5a = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -5a = 0 + -7 -5a = 0 + -7 Combine like terms: 0 + -7 = -7 -5a = -7 Divide each side by '-5'. a = 1.4 Simplifying a = 1.4
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