7(3y+9)=231

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Solution for 7(3y+9)=231 equation: 



7(3y+9)=231

We move all terms to the left:

7(3y+9)-(231)=0

We multiply parentheses

21y+63-231=0

We add all the numbers together, and all the variables

21y-168=0

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

21y=168

y=168/21

y=8

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