what is the solution to 5-t=23

a:t=28
b:t=18
c:t=-18
d:t=-23
what is the value of b if -7+b=-8
a:b=15
b:b=1
c:b+-1
D:b=-15

3 answers

I think c and a
c
but not a: -7+15 = +8
what is -7-1?