Question 1187626
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A goldsmith needs 150 grams of Gold alloys of 80% pure gold. Only two alloys of gold are available, 
the first being 90% pure gold and the other is 70% pure gold. How many grams of 85% pure gold must be used to suit the requirement
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As your post is worded and printed,  the problem is posed   I N C O R R E C T L Y :  its different parts are  INCONSISTENT.



Read your post attentively.


Find your error.


Fix your error.


Then re-post to the forum.


PLEASE do not post it to me personally.



Do not forget to post your  " THANKS "  to me for pointing your error.



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Ignore the post of @josgarithmetic,  since it is  INCORRECT  and  IRRELEVANT.



This person produces the noise and errors  ONLY  at this forum,  without any useful output.