Please check my answers

Question

1) make c the subject of the formula
a=b+cd----------b-a/d=c

2) make t the subject of the formula
u=v+2t----------u-v/2=t

3) make n the subject of the formula
m=3n+5--------m-5/3=n

4) make z the subject of the formula
x=3y+z--------x-3y=z

5a) make t the subject of the formula
r=5s+3t--------r-5s/3=t
b) make s the subject of the formula
r=5s+3t-------r-3t/5=s

Thanks

Answer 1

#1 ok, if you say (b-a)/d
same idea for #2,3,5

as written, #1 would be b - a/d, since multiplication is done before addition unless otherwise indicated with parentheses.

Your answers are otherwise ok.

Answer 2

R=s+3t
S+3t=r
T=r\3-s