Ile gramów roztworu 8 % należy dodać do 40g roztworu 2% aby otrzymać roztwór 6%
xg 8% ................ 6-2=4
...............6%
40g 2% .............. 8-6=2
x/40 = 4/2
2x = 160
x = 80g
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xg 8% ................ 6-2=4
...............6%
40g 2% .............. 8-6=2
x/40 = 4/2
2x = 160
x = 80g