Sing a funny song make it very funny here is my song

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?