Subtract the 17 then you would get -3-17 which equals -20. the you get 4x=-20. You would then divide both 4x and -20 by 4 which lastly gives you the answer of -5.
Hmm, 3 shirts cost $84 all together 84 divided by 3 is 28. 28+28+28=84. Each shirt had to be $28 to equal $84 for the final price. Hope this was right!
