Drew has 4 times as many baseball cards as Mark. Katie has 3 fewer than than half as many cards as Mark. In all they have 162 baseball cards. How many does each have?
Ok so this is how you do it..... You need to get x by itself. 8x + c = k Subtract c. 8x = k - c Divide 8 from both sides. x = k - c / 8 I hope this helps love! :)