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Simplifying 3y + -21 = 2(0) Reorder the terms: -21 + 3y = 2(0) Multiply 2 * 0 -21 + 3y = 0 Anything times zero is zero. -21 + 3y = 0 Solving -21 + 3y = 0 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 3y = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 3y = 0 + 21 3y = 0 + 21 Combine like terms: 0 + 21 = 21 3y = 21 Divide each side by '3'. y = 7 Simplifying y = 7
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