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Simplifying x + 3a + -42 = 180 Reorder the terms: -42 + 3a + x = 180 Solving -42 + 3a + x = 180 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '42' to each side of the equation. -42 + 3a + 42 + x = 180 + 42 Reorder the terms: -42 + 42 + 3a + x = 180 + 42 Combine like terms: -42 + 42 = 0 0 + 3a + x = 180 + 42 3a + x = 180 + 42 Combine like terms: 180 + 42 = 222 3a + x = 222 Add '-1x' to each side of the equation. 3a + x + -1x = 222 + -1x Combine like terms: x + -1x = 0 3a + 0 = 222 + -1x 3a = 222 + -1x Divide each side by '3'. a = 74 + -0.3333333333x Simplifying a = 74 + -0.3333333333x
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