The answer is 36 because you have to multiply it and divide getting your the answer.
Answer:

Step-by-step explanation:
Standard form is written this way: 
However, in this case, we just have to simplify 8x-3y=6-4x, as it is already mostly in standard form.
So, to do this, we have to combine like terms.
The only like terms that can be combined are -4x and 8x.
So, we add 4x to both sides, and we get:
.
It would take him 5 weeks. why?
7.89*20= $156 per week
156*5 weeks= $780