(3y+7)4y=112

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Solution for (3y+7)4y=112 equation:


Simplifying
(3y + 7) * 4y = 112

Reorder the terms:
(7 + 3y) * 4y = 112

Reorder the terms for easier multiplication:
4y(7 + 3y) = 112
(7 * 4y + 3y * 4y) = 112
(28y + 12y2) = 112

Solving
28y + 12y2 = 112

Solving for variable 'y'.

Reorder the terms:
-112 + 28y + 12y2 = 112 + -112

Combine like terms: 112 + -112 = 0
-112 + 28y + 12y2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-28 + 7y + 3y2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-28 + 7y + 3y2)' equal to zero and attempt to solve: Simplifying -28 + 7y + 3y2 = 0 Solving -28 + 7y + 3y2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -9.333333333 + 2.333333333y + y2 = 0 Move the constant term to the right: Add '9.333333333' to each side of the equation. -9.333333333 + 2.333333333y + 9.333333333 + y2 = 0 + 9.333333333 Reorder the terms: -9.333333333 + 9.333333333 + 2.333333333y + y2 = 0 + 9.333333333 Combine like terms: -9.333333333 + 9.333333333 = 0.000000000 0.000000000 + 2.333333333y + y2 = 0 + 9.333333333 2.333333333y + y2 = 0 + 9.333333333 Combine like terms: 0 + 9.333333333 = 9.333333333 2.333333333y + y2 = 9.333333333 The y term is 2.333333333y. Take half its coefficient (1.166666667). Square it (1.361111112) and add it to both sides. Add '1.361111112' to each side of the equation. 2.333333333y + 1.361111112 + y2 = 9.333333333 + 1.361111112 Reorder the terms: 1.361111112 + 2.333333333y + y2 = 9.333333333 + 1.361111112 Combine like terms: 9.333333333 + 1.361111112 = 10.694444445 1.361111112 + 2.333333333y + y2 = 10.694444445 Factor a perfect square on the left side: (y + 1.166666667)(y + 1.166666667) = 10.694444445 Calculate the square root of the right side: 3.270236145 Break this problem into two subproblems by setting (y + 1.166666667) equal to 3.270236145 and -3.270236145.

Subproblem 1

y + 1.166666667 = 3.270236145 Simplifying y + 1.166666667 = 3.270236145 Reorder the terms: 1.166666667 + y = 3.270236145 Solving 1.166666667 + y = 3.270236145 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + y = 3.270236145 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + y = 3.270236145 + -1.166666667 y = 3.270236145 + -1.166666667 Combine like terms: 3.270236145 + -1.166666667 = 2.103569478 y = 2.103569478 Simplifying y = 2.103569478

Subproblem 2

y + 1.166666667 = -3.270236145 Simplifying y + 1.166666667 = -3.270236145 Reorder the terms: 1.166666667 + y = -3.270236145 Solving 1.166666667 + y = -3.270236145 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + y = -3.270236145 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + y = -3.270236145 + -1.166666667 y = -3.270236145 + -1.166666667 Combine like terms: -3.270236145 + -1.166666667 = -4.436902812 y = -4.436902812 Simplifying y = -4.436902812

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.103569478, -4.436902812}

Solution

y = {2.103569478, -4.436902812}

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