SOLUTION: A rice trader mixes commercial rice that costs 29/kilo with that which costs 33/kilo. How many kilos of each should he mix to produce 200 kilos of a mixture that costs 30/kilo?

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Question 353393: A rice trader mixes commercial rice that costs 29/kilo with that which costs 33/kilo. How many kilos of each should he mix to produce 200 kilos of a mixture that costs 30/kilo?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = # kilos from 29/kilo rice. Then 200 - x = # kilos from 33/kilo rice.
Then 29%2Ax+%2B+33%2A%28200+-+x%29+=+200%2A30.
29%2Ax+%2B+6600+-+33%2Ax+=+6000,
-4%2Ax+=+-600,
x+=+-600%2F-4,
x+=+150.
Therefore he should mix 150 kilos of the 29/kilo rice and 50 kilos of the 33/kilo rice.