268 algebra De mystif ieD
- 0.5% 2% 1%
quarts+^4
quarts= x + 4^
quarts0.005x + 0.02(4) = 0.01(x + 4)0 005 0024 0014
0 005 0080010 004..() .( )
....xx
xx+=+
+= +
−−−
=+
−−
=0 005 0 005
0080005 004
004004
0040..
...
..
.xx
x..
.
.005
004
0 005
8xxx==Add 8 quarts of^12 % fat milk to 4 quarts of 2% milk to produce
1% milk.- 30% 70% 60%
liters+ 12 – x^
liters=^12
liters0.30x + 0.70(12 – x) = 0.60(12)0300 70 12 06012
03084070 72
0..().()
....
.xx
xx+−=
+− =
− 440 84 72
84 84
04012
12
040
3xxxx+=
−−
−=−= −
−
=..
..
..
.
.Add 3 liters of 30% alcohol solution to 12 – x = 12 – 3 = 9 liters of 70%
alcohol solution to produce 12 liters of 60% alcohol solution.