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26=213-y
We move all terms to the left:
26-(213-y)=0
We add all the numbers together, and all the variables
-(-1y+213)+26=0
We get rid of parentheses
1y-213+26=0
We add all the numbers together, and all the variables
y-187=0
We move all terms containing y to the left, all other terms to the right
y=187
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