I feel dumb, I remember this math from like middle school but I can't remember the way to figure out the formula one bit. It' so basic in fact I can't find it in my textbook. It's actually a small part of a larger problem. So basically the part I am stuck on is 35/x= 2.8 and I have to find x. Any help? I did like 35/2.8= 12.5 But is that right?

35/x= 2.8 Times both sides by x, giving 35 = 2.8 x X. Then divide both sides by 2.8 giving 35/2.8 = X. Basic substitution, but no problem not remembering, I mean, how long ago was middle school? Over a decade ago?

Multiplying both sides by x is how I remember to do it "properly" for having to show my work, but I wasn't positive on the whole "cross multiplying" thing so I kind of said screw it and just divided the 35 by 2.8. Middle school was indeed over a decade ago for me . A decade ago I was a junior in high school. Is it crazy that I find my graduate work easier than the projects and papers I had to do in middle school? pfft. EDIT: And thank you everyone, just put the whole problem together and submitted.