A wheat

A wheat factory packages wheat in sacks of three different colours. The following table shows the amount of wheat (in kg) which can be packed in each type of sack.
White sack2 kg
Brown sack3 kg
Black sack4 kg
What is the total amount of wheat (in kg) which can be packed in three white, two brown, and four black sacks?

Correct answer:

x =  28 kg

Step-by-step explanation:

w=2 kg b1=3 kg b2=4 kg  x=3 w+2 b1+4 b2=3 2+2 3+4 4=28 kg

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