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Simplifying 3[5 + -1y] = -12 [5 * 3 + -1y * 3] = -12 [15 + -3y] = -12 Solving 15 + -3y = -12 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -3y = -12 + -15 Combine like terms: 15 + -15 = 0 0 + -3y = -12 + -15 -3y = -12 + -15 Combine like terms: -12 + -15 = -27 -3y = -27 Divide each side by '-3'. y = 9 Simplifying y = 9
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