Question

How many kilograms of rice at 50 per kilogram should be mixed with 10 kilograms of rice at 80 per kilogram to get a mixture of 70 per kilogram?



please give answer in photo
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Answer 1

Answer:

(10*80+x*50 )/x+10 =70

800 +50 ×=70 x +700

20 x=100

x=5