24 white balloons 28 yellow balloons each arrangement will have same number of white balloons and yellow balloons how many balloon arrangements could you make?

Can someone me do math because i am having a breakdown rn because i don’t get it

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.

How do i i solve this equation? -18 = x/3 + 3