Here's the question you clicked on:
jenni_fowler
solve the system of equations y=2x-10 and x-y=7
By substituion: put y=2x-10 in x-y=7 x-(2x-10)=7 x-2x+10=7 -x=7-10 -x=-3 x=3 Put x=3 in y=2x-10 y=2*3-10 y=-4
Graphically you can draw the lines and find the point of intersection.
There is one more method called Elimination :)
y=2x-10 can be changed into 2x-y=10 now subtract equation 2 from 1 2x-y=10 x-y=7 ------------ x=3 put value of x in first equation you will get value of y.
shahzadjalbani gave elimination method :)
ah i like that way better i think