SOLUTION: How much of Brand A fruit punch (12% fruit juice) must be mixed with 4L of apple juice to create a mixture containing 44% fruit juice? 9L of a sugar solution was mixed with 3l o

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Question 902952: How much of Brand A fruit punch (12% fruit juice) must be mixed with 4L of apple juice to create a mixture containing 44% fruit juice?
9L of a sugar solution was mixed with 3l of a 57% sugar solution to make a 36% sugar solution. Find the percent concentration of the first solution.

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
How much of Brand A fruit punch (12% fruit juice) must be mixed with 4L of apple juice to create a mixture containing 44% fruit juice?
0.12*x+4=0.44(4+x)
0.12*x+4=1.76+.44x
2.24=.32x
x=7
0.12*7+4=0.44(4+7)
0.12*7+4=0.44(11)
.84+4.00=4.84
ok
9L of a sugar solution was mixed with 3l of a 57% sugar solution to make a 36% sugar solution. Find the percent concentration of the first solution.
9*x+0.57*3=0.36(9+3)
9*x+1.71=4.32
9x=2.61
x=.29