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Better picture!! Please help me I’m desperate!

Better picture!! Please help me I’m desperate!-example-1

1 Answer

3 votes
Hi.
Your question appears easy.
First, we multiply by 3, so now we get:

3Y = r+s+t
Now, we subtract r and t from the right side, and we get:

s = 3Y - r - t
There is your answer.

User Loquatious
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