5y-7y+y=7y+21-5y

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Solution for 5y-7y+y=7y+21-5y equation: 


Simplifying
5y + -7y + y = 7y + 21 + -5y

Combine like terms: 5y + -7y = -2y
-2y + y = 7y + 21 + -5y

Combine like terms: -2y + y = -1y
-1y = 7y + 21 + -5y

Reorder the terms:
-1y = 21 + 7y + -5y

Combine like terms: 7y + -5y = 2y
-1y = 21 + 2y

Solving
-1y = 21 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
-1y + -2y = 21 + 2y + -2y

Combine like terms: -1y + -2y = -3y
-3y = 21 + 2y + -2y

Combine like terms: 2y + -2y = 0
-3y = 21 + 0
-3y = 21

Divide each side by '-3'.
y = -7

Simplifying
y = -7

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