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Simplifying a + 157 = -3a + 9 Reorder the terms: 157 + a = -3a + 9 Reorder the terms: 157 + a = 9 + -3a Solving 157 + a = 9 + -3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3a' to each side of the equation. 157 + a + 3a = 9 + -3a + 3a Combine like terms: a + 3a = 4a 157 + 4a = 9 + -3a + 3a Combine like terms: -3a + 3a = 0 157 + 4a = 9 + 0 157 + 4a = 9 Add '-157' to each side of the equation. 157 + -157 + 4a = 9 + -157 Combine like terms: 157 + -157 = 0 0 + 4a = 9 + -157 4a = 9 + -157 Combine like terms: 9 + -157 = -148 4a = -148 Divide each side by '4'. a = -37 Simplifying a = -37
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