-20=-y-3y

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Solution for -20=-y-3y equation:


Simplifying
-20 = -1y + -3y

Combine like terms: -1y + -3y = -4y
-20 = -4y

Solving
-20 = -4y

Solving for variable 'y'.

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

Add '4y' to each side of the equation.
-20 + 4y = -4y + 4y

Combine like terms: -4y + 4y = 0
-20 + 4y = 0

Add '20' to each side of the equation.
-20 + 20 + 4y = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 4y = 0 + 20
4y = 0 + 20

Combine like terms: 0 + 20 = 20
4y = 20

Divide each side by '4'.
y = 5

Simplifying
y = 5

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