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Simplifying 42 + -1y = 39 Solving 42 + -1y = 39 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + -1y = 39 + -42 Combine like terms: 42 + -42 = 0 0 + -1y = 39 + -42 -1y = 39 + -42 Combine like terms: 39 + -42 = -3 -1y = -3 Divide each side by '-1'. y = 3 Simplifying y = 3
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