80-y=y+40

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Solution for 80-y=y+40 equation:


Simplifying
80 + -1y = y + 40

Reorder the terms:
80 + -1y = 40 + y

Solving
80 + -1y = 40 + 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.
80 + -1y + -1y = 40 + y + -1y

Combine like terms: -1y + -1y = -2y
80 + -2y = 40 + y + -1y

Combine like terms: y + -1y = 0
80 + -2y = 40 + 0
80 + -2y = 40

Add '-80' to each side of the equation.
80 + -80 + -2y = 40 + -80

Combine like terms: 80 + -80 = 0
0 + -2y = 40 + -80
-2y = 40 + -80

Combine like terms: 40 + -80 = -40
-2y = -40

Divide each side by '-2'.
y = 20

Simplifying
y = 20

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