Question

5x − 3y − z if x = −2, y = 2, and z = −3

Answer 1

Just plug in and solve 
5x − 3y − z → 5(-2) − 3(2) − (-3)

5(-2) − 3(2) − (-3) → -10 - 6 +3

-10 - 6 +3 → -16 + 3 

-16 + 3 = -13 

answer is -13

Answer 2

The answer is -13. Hope I helped ;)