on January they sold 139 more Doughlas firs than Noble firs. The toal trees sold was 377. which of these is right for me to solve it??

n-139=377
n+139 = 377
2n +139 =377
2n+139 = 377
I think it is the first one??

If n Noble firs were sold, then n+139 Douglas firs were sold. So,

n + n+139 = 377 total trees
2n+139=377

Two times the number of trees wich is 2n right? Thanks!!!!!!!!!!!!!!!!!!!!!

To solve the given problem, let's assume the number of Noble firs sold as 'n'.

According to the information provided, they sold 139 more Douglas firs than Noble firs. Therefore, the number of Douglas firs sold can be represented as 'n + 139'.

The total number of trees sold is given as 377.

Now, we can set up the equation:

n + (n + 139) = 377

Simplifying the equation, we get:

2n + 139 = 377

So, the correct equation to solve the problem is:

2n + 139 = 377

Hence, your choice of the fourth equation is correct.