20(y-4)=400

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Solution for 20(y-4)=400 equation: 



20(y-4)=400

We move all terms to the left:

20(y-4)-(400)=0

We multiply parentheses

20y-80-400=0

We add all the numbers together, and all the variables

20y-480=0

We move all terms containing y to the left, all other terms to the right

20y=480

y=480/20

y=24

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