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gavmur [86]
3 years ago
6

Help? i do not understand how to get the answer...​

Mathematics
1 answer:
Oduvanchick [21]3 years ago
6 0

Answer:

A

Step-by-step explanation:

Let x ml be the amount of paint color B mixed with 40 ml of paint color A.

In 40 ml of paint color A are 15% of black pigment, so there are

0.15\cdot 40\ ml

of black pigment.

In x ml of paint color B are 60% of black pigment, so there are

0.6\cdot x\ ml

of black pigment.

In total we het x+40 ml of mixture. There are 25% of black pigment that is

0.25\cdot (x+40)\ ml.

Thus,

0.15\cdot 40+0.6\cdot x=0.25\cdot (x+40).

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