jason is 4 years older than his brother derek. 4 years ago jason was twice the age of derek. how old is jason now?

8
I believe
I think so

Have derek be x, and jason be y.

this means you can set up a system of equations with:

x+4=y and y-4= 2x-8, or y= 2x-4

since they both equal y, you can set them equal to each other and solve for x

2x-4=x+4

x=8, meaning derek is 8 and if you add 4, that means Jason is 12

JASON IS 12

For me : 7x^2 - 14x + 10