we have given an expression [tex] mx-y [/tex].
we have given the value of x,y and m .
[tex] m=5,x=3,y=8 [/tex].
we need to find the value of expression mx-y.
we need to plug the respective values and solve.
[tex] mx-y=(5)*(3)-(8)=15-8=7. [/tex].
7 is the value of expression mx-y.