Question

I need help can someone help me

Answer 1

1. 6=a/4+2
    6-2=a/4
    4=a/4
    4(4)=a
    a=16
2. -6+x/4=-5
    x/4=-5+6
    x/4=1
    x=4
3. 9x-7=-7
    9x=-7+7
    9x=0
    x=0
4. 0=4+n/5
    -4=n/5
    -4(5)=n
    n=-20
5. -4=r/20-5
    -4+5=r/20
     1=r/20
      r=20
6. -1=(5+x)/6
    -1(6)=5+x
    -6=5+x
    x=-11
8. 2(n+5)=-2
    n+5=-1
    n=-6
9. -9x+1=-80
    -9x=-81
    x=9
10. -6=n/2-10
      4=n/2
      8=n