SOLUTION: a landscaping company needs 220 gallons of 23% fertilizer to fertilize the shrubs in an office park they have in stock a 30% fertilizer and 20% fertilizer how much of each type sho

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Question 898757: a landscaping company needs 220 gallons of 23% fertilizer to fertilize the shrubs in an office park they have in stock a 30% fertilizer and 20% fertilizer how much of each type should they mix together?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
a+b=220,
0.3*a+0.2*b=0.23*220
a=220-b
0.3*(220-b)+0.2*b=50.6
66-0.3b+0.2*b=50.6
-0.1*b=-15.4
b=154
a=220-b
a=66 b=154