



 
Hi Rosie, Often for this type of problem the instructions will read "Solve for y in terms of x." You are not going to obtain a numeric value for y but rather an expression for y which involves the variable x. I do a similar problem.
I want an equation with y on the left side and the right side containing x terms and constant terms but no y terms. My first step is to add 4y to each side to obtain
Next subtract 8 for each side
To remove the x term from the left side subtract 5x from each side
All that remains is to divide each side by 4
Now try your problem,  


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