-4y-40=20

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Solution for -4y-40=20 equation: 


Simplifying
-4y + -40 = 20

Reorder the terms:
-40 + -4y = 20

Solving
-40 + -4y = 20

Solving for variable 'y'.

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

Add '40' to each side of the equation.
-40 + 40 + -4y = 20 + 40

Combine like terms: -40 + 40 = 0
0 + -4y = 20 + 40
-4y = 20 + 40

Combine like terms: 20 + 40 = 60
-4y = 60

Divide each side by '-4'.
y = -15

Simplifying
y = -15

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