7y-y=-20+y

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Solution for 7y-y=-20+y equation: 


Simplifying
7y + -1y = -20 + y

Combine like terms: 7y + -1y = 6y
6y = -20 + y

Solving
6y = -20 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
6y + -1y = -20 + y + -1y

Combine like terms: 6y + -1y = 5y
5y = -20 + y + -1y

Combine like terms: y + -1y = 0
5y = -20 + 0
5y = -20

Divide each side by '5'.
y = -4

Simplifying
y = -4

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