Simplify $3t+4-6t+7t-4$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Simplify $3t+4-6t+7t-4$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4t
Simplify $3t+4-6t+7t-4$.
train