How much skim milk should I add to 5 liters of 7% milk to produce a mixture of 2 46/47% milk?

Answer 1

I think this is what you are looking for, you question is difficult to understand.

7% of 5 liters = 0∙35 Liters.

2 46/ 47% = 140/ 47%
7 = 329 / 47%
Ratio is 140:329 = 469 parts.
2 46/ 47 of 7% = 0∙35 Liters x 140/ 469
2 46/ 47 of 7% = 0∙104 477 611 Litres.
2 46/ 47 of 7% ≈ 0∙104 Litres.

Answer 2

we now have 5 liters of 7% milk, so we have 93% skim milk and 7% milk fat. So we have:

5(0.07) = amt of milkfat

We want to add x liters of skim milk to reduce this to 2 46/47% milkfat, or 0.029787234

After we add x liters, we will have (x + 5) liters...
so...

(x+5)(0.029787234) = 5(0.07)
0.0298x + 0.1489 = 0.35
x = 0.2011/0.0298 = 6.75 liters

Hope this helps!

Answer 3

(5/5+x)*2+(x/5+x)*7=140/47
10+7x=(x+5)*140/47
470+329x=140x+700
189x=230
x=230/189=1.2169 liters