-y^2-6y=-7

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Solution for -y^2-6y=-7 equation:


Simplifying
-1y2 + -6y = -7

Reorder the terms:
-6y + -1y2 = -7

Solving
-6y + -1y2 = -7

Solving for variable 'y'.

Reorder the terms:
7 + -6y + -1y2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + -6y + -1y2 = 0

Factor a trinomial.
(1 + -1y)(7 + y) = 0

Subproblem 1

Set the factor '(1 + -1y)' equal to zero and attempt to solve: Simplifying 1 + -1y = 0 Solving 1 + -1y = 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 + -1y = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1y = 0 + -1 -1y = 0 + -1 Combine like terms: 0 + -1 = -1 -1y = -1 Divide each side by '-1'. y = 1 Simplifying y = 1

Subproblem 2

Set the factor '(7 + y)' equal to zero and attempt to solve: Simplifying 7 + y = 0 Solving 7 + y = 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 + y = 0 + -7 Combine like terms: 7 + -7 = 0 0 + y = 0 + -7 y = 0 + -7 Combine like terms: 0 + -7 = -7 y = -7 Simplifying y = -7

Solution

y = {1, -7}

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