Let's solve for f.
9xyf=87
Step 1: Divide both sides by 9xy.
9fxy / 9xy = 87 / 9xy
Description:
Since we are solving for f. Step 1 is to divide both sides by 9xy. That the only step to do. After you divide you answer will come as...
Answer: f=29/3xy
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Hope this helps.