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Simplifying 3y2 = -2y + 21 Reorder the terms: 3y2 = 21 + -2y Solving 3y2 = 21 + -2y Solving for variable 'y'. Reorder the terms: -21 + 2y + 3y2 = 21 + -2y + -21 + 2y Reorder the terms: -21 + 2y + 3y2 = 21 + -21 + -2y + 2y Combine like terms: 21 + -21 = 0 -21 + 2y + 3y2 = 0 + -2y + 2y -21 + 2y + 3y2 = -2y + 2y Combine like terms: -2y + 2y = 0 -21 + 2y + 3y2 = 0 Factor a trinomial. (-3 + -1y)(7 + -3y) = 0Subproblem 1
Set the factor '(-3 + -1y)' equal to zero and attempt to solve: Simplifying -3 + -1y = 0 Solving -3 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1y = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1y = 0 + 3 -1y = 0 + 3 Combine like terms: 0 + 3 = 3 -1y = 3 Divide each side by '-1'. y = -3 Simplifying y = -3Subproblem 2
Set the factor '(7 + -3y)' equal to zero and attempt to solve: Simplifying 7 + -3y = 0 Solving 7 + -3y = 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 + -3y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3y = 0 + -7 -3y = 0 + -7 Combine like terms: 0 + -7 = -7 -3y = -7 Divide each side by '-3'. y = 2.333333333 Simplifying y = 2.333333333Solution
y = {-3, 2.333333333}
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