40y-40y-90=80y

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Solution for 40y-40y-90=80y equation:


Simplifying
40y + -40y + -90 = 80y

Reorder the terms:
-90 + 40y + -40y = 80y

Combine like terms: 40y + -40y = 0
-90 + 0 = 80y
-90 = 80y

Solving
-90 = 80y

Solving for variable 'y'.

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

Add '-80y' to each side of the equation.
-90 + -80y = 80y + -80y

Combine like terms: 80y + -80y = 0
-90 + -80y = 0

Add '90' to each side of the equation.
-90 + 90 + -80y = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -80y = 0 + 90
-80y = 0 + 90

Combine like terms: 0 + 90 = 90
-80y = 90

Divide each side by '-80'.
y = -1.125

Simplifying
y = -1.125

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