y+2y=400

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Solution for y+2y=400 equation: 



y+2y=400

We move all terms to the left:

y+2y-(400)=0

We add all the numbers together, and all the variables

3y-400=0

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

3y=400

y=400/3

y=133+1/3

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