Can someone do these 20 problems for me I’ll make whoever answers first the Brainlylist … Due today

I am unable to see number 49 so if you want me to answer it please tell so.
Answer/Step-by-step explanation:
31) m= -6
32) P=12
33) n = -19
34) x =2
35) r = -10
36)b=10
37) x=10
38) v=6
39)n=-2
40)x=15
41)x=-15
42)a=36
43)n=-6
44)p=0
45)k=-18
46)m=-8
47)x=7
48)n=10
50)x=-2
If You have any question or need the explanation for any question please tell me.
[RevyBreeze]