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Simplifying 7(2y + -1) + 3y = -3y(y + 2 + 9) Reorder the terms: 7(-1 + 2y) + 3y = -3y(y + 2 + 9) (-1 * 7 + 2y * 7) + 3y = -3y(y + 2 + 9) (-7 + 14y) + 3y = -3y(y + 2 + 9) Combine like terms: 14y + 3y = 17y -7 + 17y = -3y(y + 2 + 9) Reorder the terms: -7 + 17y = -3y(2 + 9 + y) Combine like terms: 2 + 9 = 11 -7 + 17y = -3y(11 + y) -7 + 17y = (11 * -3y + y * -3y) -7 + 17y = (-33y + -3y2) Solving -7 + 17y = -33y + -3y2 Solving for variable 'y'. Combine like terms: 17y + 33y = 50y -7 + 50y + 3y2 = -33y + -3y2 + 33y + 3y2 Reorder the terms: -7 + 50y + 3y2 = -33y + 33y + -3y2 + 3y2 Combine like terms: -33y + 33y = 0 -7 + 50y + 3y2 = 0 + -3y2 + 3y2 -7 + 50y + 3y2 = -3y2 + 3y2 Combine like terms: -3y2 + 3y2 = 0 -7 + 50y + 3y2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -2.333333333 + 16.66666667y + y2 = 0 Move the constant term to the right: Add '2.333333333' to each side of the equation. -2.333333333 + 16.66666667y + 2.333333333 + y2 = 0 + 2.333333333 Reorder the terms: -2.333333333 + 2.333333333 + 16.66666667y + y2 = 0 + 2.333333333 Combine like terms: -2.333333333 + 2.333333333 = 0.000000000 0.000000000 + 16.66666667y + y2 = 0 + 2.333333333 16.66666667y + y2 = 0 + 2.333333333 Combine like terms: 0 + 2.333333333 = 2.333333333 16.66666667y + y2 = 2.333333333 The y term is 16.66666667y. Take half its coefficient (8.333333335). Square it (69.44444447) and add it to both sides. Add '69.44444447' to each side of the equation. 16.66666667y + 69.44444447 + y2 = 2.333333333 + 69.44444447 Reorder the terms: 69.44444447 + 16.66666667y + y2 = 2.333333333 + 69.44444447 Combine like terms: 2.333333333 + 69.44444447 = 71.777777803 69.44444447 + 16.66666667y + y2 = 71.777777803 Factor a perfect square on the left side: (y + 8.333333335)(y + 8.333333335) = 71.777777803 Calculate the square root of the right side: 8.472176686 Break this problem into two subproblems by setting (y + 8.333333335) equal to 8.472176686 and -8.472176686.Subproblem 1
y + 8.333333335 = 8.472176686 Simplifying y + 8.333333335 = 8.472176686 Reorder the terms: 8.333333335 + y = 8.472176686 Solving 8.333333335 + y = 8.472176686 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-8.333333335' to each side of the equation. 8.333333335 + -8.333333335 + y = 8.472176686 + -8.333333335 Combine like terms: 8.333333335 + -8.333333335 = 0.000000000 0.000000000 + y = 8.472176686 + -8.333333335 y = 8.472176686 + -8.333333335 Combine like terms: 8.472176686 + -8.333333335 = 0.138843351 y = 0.138843351 Simplifying y = 0.138843351Subproblem 2
y + 8.333333335 = -8.472176686 Simplifying y + 8.333333335 = -8.472176686 Reorder the terms: 8.333333335 + y = -8.472176686 Solving 8.333333335 + y = -8.472176686 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-8.333333335' to each side of the equation. 8.333333335 + -8.333333335 + y = -8.472176686 + -8.333333335 Combine like terms: 8.333333335 + -8.333333335 = 0.000000000 0.000000000 + y = -8.472176686 + -8.333333335 y = -8.472176686 + -8.333333335 Combine like terms: -8.472176686 + -8.333333335 = -16.805510021 y = -16.805510021 Simplifying y = -16.805510021Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.138843351, -16.805510021}
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