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Simplifying 3(7) + 7y = 7 Multiply 3 * 7 21 + 7y = 7 Solving 21 + 7y = 7 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 + 7y = 7 + -21 Combine like terms: 21 + -21 = 0 0 + 7y = 7 + -21 7y = 7 + -21 Combine like terms: 7 + -21 = -14 7y = -14 Divide each side by '7'. y = -2 Simplifying y = -2
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