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Simplifying -3(y + -2) = -21 Reorder the terms: -3(-2 + y) = -21 (-2 * -3 + y * -3) = -21 (6 + -3y) = -21 Solving 6 + -3y = -21 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -3y = -21 + -6 Combine like terms: 6 + -6 = 0 0 + -3y = -21 + -6 -3y = -21 + -6 Combine like terms: -21 + -6 = -27 -3y = -27 Divide each side by '-3'. y = 9 Simplifying y = 9
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