20y-21y=70

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Solution for 20y-21y=70 equation: 


Simplifying
20y + -21y = 70

Combine like terms: 20y + -21y = -1y
-1y = 70

Solving
-1y = 70

Solving for variable 'y'.

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

Divide each side by '-1'.
y = -70

Simplifying
y = -70

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