$5$ green balls and $2$ red balls together weigh $10$ pounds, and $1$ green ball and $4$ red balls together weigh $7$ pounds. If all red balls weigh the same amount and all green balls weigh the same, then what is the weight of $8$ red and $8$ green balls together?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
$5$ green balls and $2$ red balls together weigh $10$ pounds, and $1$ green ball and $4$ red balls together weigh $7$ pounds. If all red balls weigh the same amount and all green balls weigh the same, then what is the weight of $8$ red and $8$ green balls together?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{68}{3}\text{ pounds}
$5$ green balls and $2$ red balls together weigh $10$ pounds, and $1$ green ball and $4$ red balls together weigh $7$ pounds. If all red balls weigh the same amount and all green balls weigh the same, then what is the weight of $8$ red and $8$ green balls together?
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