Orange colour

In order for the painter to get orange, he has to mix yellow and red in a ratio of 3: 4. How many liters of orange did he mix if he used 8 liters of red?

Correct answer:

x =  14 l

Step-by-step explanation:

$$\begin{gathered} b=8\text{ l } \\ a=3\mathrm{/}4\cdot b \\ x=a+b \\ a=3\mathrm{/}4\cdot 8 \\ x=a+8 \\ 4a=24 \\ a-x=-8 \\ a=6 \\ x=14\text{ l} \end{gathered}$$

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