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put this solution on YOUR website!a plant manager needs a solution of 77% herbicide to be mixed with a solution of 67% herbicide to form 30 liters of 74% solution. How many liters of the 77% solution must he use?
x=liters of 77%
30-x=liters of 67%
coefficient=percent
77x+67(30-x)=74(30)------------------------solution of 77% herbicide mixed with a solution of 67% herbicide = 30 liters of 74% solution.
Distribute
77x+2010-67x=2220
Combine like terms
10x+2010=2220
Subtract 2010 from both sides
10x=210
Divide by 10
x=21
x=liters of 77%
30-x=liters of 67%
Answer:
liters of 77%=21
liters of 67%=9
