If the ratio of $b$ to $a$ is 3, then what is the value of $a$ when $b=12-5a$?
Question:
If the ratio of $b$ to $a$ is 3, then what is the value of $a$ when $b=12-5a$?
Answer:
Let's think step by step.

user
\frac{3}{2}
If the ratio of $b$ to $a$ is 3, then what is the value of $a$ when $b=12-5a$?
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