Answer:

Step-by-step explanation:
From the image (or by just looking at the equations and know what each part represents) you can tell the solution is (0;2)
Analitically, you already have them in a
form, so let's compare the two RHSs:
. Let's replace the value in either to find 
25(6) + [8(6-s)] = t, where s = number of hours and t = total.
To reach percentage, you just have to move the decimal two times to the right. Doing that to 0.12 leaves us with 12, which is the answer.
In short simply we "multiply one fraction's top and bottom by the other's denominator", so let's do so,
Is that on a math website called Desmos?