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Simplifying 4y + -1(2y + -1) = 7 Reorder the terms: 4y + -1(-1 + 2y) = 7 4y + (-1 * -1 + 2y * -1) = 7 4y + (1 + -2y) = 7 Reorder the terms: 1 + 4y + -2y = 7 Combine like terms: 4y + -2y = 2y 1 + 2y = 7 Solving 1 + 2y = 7 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2y = 7 + -1 Combine like terms: 1 + -1 = 0 0 + 2y = 7 + -1 2y = 7 + -1 Combine like terms: 7 + -1 = 6 2y = 6 Divide each side by '2'. y = 3 Simplifying y = 3
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