Answer :
To evaluate the expression:
[tex]3a-x[/tex]when a=7 and x=-2 we have tu plug this values in their corresponding places, that is:
[tex]3(7)-(-2)=21+2=23[/tex]Therefore, the expression is 23.
To evaluate the expression:
[tex]3a-x[/tex]when a=7 and x=-2 we have tu plug this values in their corresponding places, that is:
[tex]3(7)-(-2)=21+2=23[/tex]Therefore, the expression is 23.