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Simplifying 8(-7) + 7y = 21 Multiply 8 * -7 -56 + 7y = 21 Solving -56 + 7y = 21 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '56' to each side of the equation. -56 + 56 + 7y = 21 + 56 Combine like terms: -56 + 56 = 0 0 + 7y = 21 + 56 7y = 21 + 56 Combine like terms: 21 + 56 = 77 7y = 77 Divide each side by '7'. y = 11 Simplifying y = 11
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