8-y=(7+y)3

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Solution for 8-y=(7+y)3 equation:


Simplifying
8 + -1y = (7 + y) * 3

Reorder the terms for easier multiplication:
8 + -1y = 3(7 + y)
8 + -1y = (7 * 3 + y * 3)
8 + -1y = (21 + 3y)

Solving
8 + -1y = 21 + 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
8 + -1y + -3y = 21 + 3y + -3y

Combine like terms: -1y + -3y = -4y
8 + -4y = 21 + 3y + -3y

Combine like terms: 3y + -3y = 0
8 + -4y = 21 + 0
8 + -4y = 21

Add '-8' to each side of the equation.
8 + -8 + -4y = 21 + -8

Combine like terms: 8 + -8 = 0
0 + -4y = 21 + -8
-4y = 21 + -8

Combine like terms: 21 + -8 = 13
-4y = 13

Divide each side by '-4'.
y = -3.25

Simplifying
y = -3.25

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