(7-y)2+-4y=-20

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Solution for (7-y)2+-4y=-20 equation: 


Simplifying
(7 + -1y) * 2 + -4y = -20

Reorder the terms for easier multiplication:
2(7 + -1y) + -4y = -20
(7 * 2 + -1y * 2) + -4y = -20
(14 + -2y) + -4y = -20

Combine like terms: -2y + -4y = -6y
14 + -6y = -20

Solving
14 + -6y = -20

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-14' to each side of the equation.
14 + -14 + -6y = -20 + -14

Combine like terms: 14 + -14 = 0
0 + -6y = -20 + -14
-6y = -20 + -14

Combine like terms: -20 + -14 = -34
-6y = -34

Divide each side by '-6'.
y = 5.666666667

Simplifying
y = 5.666666667

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