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Simplifying (3y + -1)(7 + y) = 0 Reorder the terms: (-1 + 3y)(7 + y) = 0 Multiply (-1 + 3y) * (7 + y) (-1(7 + y) + 3y * (7 + y)) = 0 ((7 * -1 + y * -1) + 3y * (7 + y)) = 0 ((-7 + -1y) + 3y * (7 + y)) = 0 (-7 + -1y + (7 * 3y + y * 3y)) = 0 (-7 + -1y + (21y + 3y2)) = 0 Combine like terms: -1y + 21y = 20y (-7 + 20y + 3y2) = 0 Solving -7 + 20y + 3y2 = 0 Solving for variable 'y'. Factor a trinomial. (-7 + -1y)(1 + -3y) = 0Subproblem 1
Set the factor '(-7 + -1y)' equal to zero and attempt to solve: Simplifying -7 + -1y = 0 Solving -7 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1y = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1y = 0 + 7 -1y = 0 + 7 Combine like terms: 0 + 7 = 7 -1y = 7 Divide each side by '-1'. y = -7 Simplifying y = -7Subproblem 2
Set the factor '(1 + -3y)' equal to zero and attempt to solve: Simplifying 1 + -3y = 0 Solving 1 + -3y = 0 Move all terms containing y to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -3y = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3y = 0 + -1 -3y = 0 + -1 Combine like terms: 0 + -1 = -1 -3y = -1 Divide each side by '-3'. y = 0.3333333333 Simplifying y = 0.3333333333Solution
y = {-7, 0.3333333333}
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