If we manipulate the equation and make k the subject we get 1.2 which is the answer.
If we manipulate the equation and make t the subject we get 0.56 which is the answer.
If we manipulate the equation and make z the subject we get 63.36 which is the answer.
If we manipulate the equation and make x the subject we get 1.2 which is the answer.
If we manipulate the equation and make x the subject we get -0.831 which is the answer.
If we manipulate the equation and make x the subject we get 0.706 which is the answer.